56658707551 has 4 divisors (see below), whose sum is σ = 56685025872. Its totient is φ = 56632389232.

The previous prime is 56658707549. The next prime is 56658707563. The reversal of 56658707551 is 15570785665.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 56658707551 - 2¹ = 56658707549 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 56658707492 and 56658707501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56658708551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13155931 + ... + 13160236.

It is an arithmetic number, because the mean of its divisors is an integer number (14171256468).

Almost surely, 2^56658707551 is an apocalyptic number.

56658707551 is a deficient number, since it is larger than the sum of its proper divisors (26318321).

56658707551 is a wasteful number, since it uses less digits than its factorization.

56658707551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26318320.

The product of its (nonzero) digits is 8820000, while the sum is 55.

The spelling of 56658707551 in words is "fifty-six billion, six hundred fifty-eight million, seven hundred seven thousand, five hundred fifty-one".