56837542681 has 2 divisors, whose sum is σ = 56837542682. Its totient is φ = 56837542680.

The previous prime is 56837542667. The next prime is 56837542721. The reversal of 56837542681 is 18624573865.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32595052681 + 24242490000 = 180541^2 + 155700^2 .

It is a cyclic number.

It is not a de Polignac number, because 56837542681 - 2¹⁵ = 56837509913 is a prime.

It is a super-2 number, since 2×56837542681² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (56837542651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28418771340 + 28418771341.

It is an arithmetic number, because the mean of its divisors is an integer number (28418771341).

Almost surely, 2^56837542681 is an apocalyptic number.

It is an amenable number.

56837542681 is a deficient number, since it is larger than the sum of its proper divisors (1).

56837542681 is an equidigital number, since it uses as much as digits as its factorization.

56837542681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9676800, while the sum is 55.

The spelling of 56837542681 in words is "fifty-six billion, eight hundred thirty-seven million, five hundred forty-two thousand, six hundred eighty-one".