56509774831 has 8 divisors (see below), whose sum is σ = 57893295600. Its totient is φ = 55126503360.

The previous prime is 56509774801. The next prime is 56509774843. The reversal of 56509774831 is 13847790565.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 56509774831 - 2¹¹ = 56509772783 is a prime.

It is a super-2 number, since 2×56509774831² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56509774801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 446860 + ... + 559198.

It is an arithmetic number, because the mean of its divisors is an integer number (7236661950).

Almost surely, 2^56509774831 is an apocalyptic number.

56509774831 is a deficient number, since it is larger than the sum of its proper divisors (1383520769).

56509774831 is a wasteful number, since it uses less digits than its factorization.

56509774831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124649.

The product of its (nonzero) digits is 6350400, while the sum is 55.

The spelling of 56509774831 in words is "fifty-six billion, five hundred nine million, seven hundred seventy-four thousand, eight hundred thirty-one".