56865823631 has 4 divisors (see below), whose sum is σ = 56866914000. Its totient is φ = 56864733264.

The previous prime is 56865823613. The next prime is 56865823639. The reversal of 56865823631 is 13632856865.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56865823631 is a prime.

It is a super-2 number, since 2×56865823631² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56865823639) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 462806 + ... + 572643.

It is an arithmetic number, because the mean of its divisors is an integer number (14216728500).

Almost surely, 2^56865823631 is an apocalyptic number.

56865823631 is a deficient number, since it is larger than the sum of its proper divisors (1090369).

56865823631 is a wasteful number, since it uses less digits than its factorization.

56865823631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1090368.

The product of its digits is 6220800, while the sum is 53.

The spelling of 56865823631 in words is "fifty-six billion, eight hundred sixty-five million, eight hundred twenty-three thousand, six hundred thirty-one".