56556783431 has 4 divisors (see below), whose sum is σ = 57139843152. Its totient is φ = 55973723712.

The previous prime is 56556783403. The next prime is 56556783433. The reversal of 56556783431 is 13438765565.

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-56556783431 is a prime.

It is a super-2 number, since 2×56556783431² (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 (56556783433) 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, 291529715 + ... + 291529908.

It is an arithmetic number, because the mean of its divisors is an integer number (14284960788).

Almost surely, 2^56556783431 is an apocalyptic number.

56556783431 is a deficient number, since it is larger than the sum of its proper divisors (583059721).

56556783431 is an equidigital number, since it uses as much as digits as its factorization.

56556783431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 583059720.

The product of its digits is 9072000, while the sum is 53.

The spelling of 56556783431 in words is "fifty-six billion, five hundred fifty-six million, seven hundred eighty-three thousand, four hundred thirty-one".