56631820403 has 32 divisors (see below), whose sum is σ = 60967821312. Its totient is φ = 52478474400.

The previous prime is 56631820391. The next prime is 56631820423. The reversal of 56631820403 is 30402813665.

It is not a de Polignac number, because 56631820403 - 2¹⁶ = 56631754867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56631820423) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 58322708 + ... + 58323678.

It is an arithmetic number, because the mean of its divisors is an integer number (1905244416).

Almost surely, 2^56631820403 is an apocalyptic number.

56631820403 is a deficient number, since it is larger than the sum of its proper divisors (4336000909).

56631820403 is a wasteful number, since it uses less digits than its factorization.

56631820403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1535.

The product of its (nonzero) digits is 103680, while the sum is 38.

The spelling of 56631820403 in words is "fifty-six billion, six hundred thirty-one million, eight hundred twenty thousand, four hundred three".