56556376637 has 2 divisors, whose sum is σ = 56556376638. Its totient is φ = 56556376636.

The previous prime is 56556376559. The next prime is 56556376649. The reversal of 56556376637 is 73667365565.

56556376637 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54571763236 + 1984613401 = 233606^2 + 44549^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56556376637 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56556375637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28278188318 + 28278188319.

It is an arithmetic number, because the mean of its divisors is an integer number (28278188319).

Almost surely, 2^56556376637 is an apocalyptic number.

It is an amenable number.

56556376637 is a deficient number, since it is larger than the sum of its proper divisors (1).

56556376637 is an equidigital number, since it uses as much as digits as its factorization.

56556376637 is an evil number, because the sum of its binary digits is even.

The product of its digits is 71442000, while the sum is 59.

The spelling of 56556376637 in words is "fifty-six billion, five hundred fifty-six million, three hundred seventy-six thousand, six hundred thirty-seven".