56431203613 has 4 divisors (see below), whose sum is σ = 56484999900. Its totient is φ = 56377407328.

The previous prime is 56431203583. The next prime is 56431203649. The reversal of 56431203613 is 31630213465.

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

It can be written as a sum of positive squares in 2 ways, for example, as 29625982884 + 26805220729 = 172122^2 + 163723^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56431203613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56431203113) 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, 26896570 + ... + 26898667.

It is an arithmetic number, because the mean of its divisors is an integer number (14121249975).

Almost surely, 2^56431203613 is an apocalyptic number.

It is an amenable number.

56431203613 is a deficient number, since it is larger than the sum of its proper divisors (53796287).

56431203613 is a wasteful number, since it uses less digits than its factorization.

56431203613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53796286.

The product of its (nonzero) digits is 38880, while the sum is 34.

The spelling of 56431203613 in words is "fifty-six billion, four hundred thirty-one million, two hundred three thousand, six hundred thirteen".