56545861631 has 8 divisors (see below), whose sum is σ = 64654882944. Its totient is φ = 48444600600.

The previous prime is 56545861621. The next prime is 56545861649. The reversal of 56545861631 is 13616854565.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56545861631 is a prime.

It is a super-2 number, since 2×56545861631² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 56545861631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56545861621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1924445 + ... + 1953606.

It is an arithmetic number, because the mean of its divisors is an integer number (8081860368).

Almost surely, 2^56545861631 is an apocalyptic number.

56545861631 is a deficient number, since it is larger than the sum of its proper divisors (8109021313).

56545861631 is a wasteful number, since it uses less digits than its factorization.

56545861631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3880141.

The product of its digits is 2592000, while the sum is 50.

The spelling of 56545861631 in words is "fifty-six billion, five hundred forty-five million, eight hundred sixty-one thousand, six hundred thirty-one".