56438653257 has 40 divisors (see below), whose sum is σ = 96407131392. Its totient is φ = 32232816000.

The previous prime is 56438653241. The next prime is 56438653273. The reversal of 56438653257 is 75235683465.

56438653257 is a `hidden beast` number, since 5 + 6 + 4 + 386 + 5 + 3 + 257 = 666.

It is an interprime number because it is at equal distance from previous prime (56438653241) and next prime (56438653273).

It is not a de Polignac number, because 56438653257 - 2⁴ = 56438653241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (56438653207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1034257 + ... + 1087457.

Almost surely, 2^56438653257 is an apocalyptic number.

It is an amenable number.

56438653257 is a deficient number, since it is larger than the sum of its proper divisors (39968478135).

56438653257 is a wasteful number, since it uses less digits than its factorization.

56438653257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55091 (or 55082 counting only the distinct ones).

The product of its digits is 18144000, while the sum is 54.

The spelling of 56438653257 in words is "fifty-six billion, four hundred thirty-eight million, six hundred fifty-three thousand, two hundred fifty-seven".