Properties of the number

Number length
Sum of digits
Multiplication of digits
of 641 = 6.41
/2 320.5 /3 213.66666666667 /4 160.25 /5 128.2 /6 106.83333333333 /7 91.571428571429 /8 80.125 /9 71.222222222222 /10 64.1 /11 58.272727272727 /12 53.416666666667 /13 49.307692307692 /14 45.785714285714 /15 42.733333333333 /16 40.0625 /17 37.705882352941 /18 35.611111111111 /19 33.736842105263 /20 32.05
Parity
Odd
Is a prime number?
Yes
Next prime number
Is a composite number?
No
Is a semiprime number?
No
Is a linear number?
Yes
Is a square pyramidal number?
No
Triangular number
(T641)Is an abundant number?
No, it's a deficient number
Is a Fibonacci number?
No
Is a Harshad number?
(Niven number)No
Count of divisors
Sum of divisors
Inverse number
0.0015600624024961
Exponentiation
2 410881 3 263374721 4 168823196161 5 108215668739201 6 69366243661827841 7 44463762187231646081 8 28501271562015485137921 9 18269315071251925973407361 10 11710630960672484548954118401
2√ 25.317977802344 3√ 8.6222248300477 4√ 5.0316973082991 5√ 3.6422655481871 6√ 2.9363625167965 7√ 2.5175593553105 8√ 2.2431445134674 9√ 2.0505629887438 10√ 1.9084720454298 1.7995706927853
Square root and remainder
252 + 16
Is a perfect square?
No
Is a perfect cube?
No
Natural logarithm
(loge)6.4630294569207
Common logarithm
(log10)2.8068580295188
Binary logarithm
(log2)9.3241805466187