56382725981 has 2 divisors, whose sum is σ = 56382725982. Its totient is φ = 56382725980.

The previous prime is 56382725969. The next prime is 56382726017. The reversal of 56382725981 is 18952728365.

It is a happy number.

56382725981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40194235225 + 16188490756 = 200485^2 + 127234^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56382725981 is a prime.

It is a super-2 number, since 2×56382725981² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56382725681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28191362990 + 28191362991.

It is an arithmetic number, because the mean of its divisors is an integer number (28191362991).

Almost surely, 2^56382725981 is an apocalyptic number.

It is an amenable number.

56382725981 is a deficient number, since it is larger than the sum of its proper divisors (1).

56382725981 is an equidigital number, since it uses as much as digits as its factorization.

56382725981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7257600, while the sum is 56.

The spelling of 56382725981 in words is "fifty-six billion, three hundred eighty-two million, seven hundred twenty-five thousand, nine hundred eighty-one".