56656657903 has 2 divisors, whose sum is σ = 56656657904. Its totient is φ = 56656657902.

The previous prime is 56656657861. The next prime is 56656657907. The reversal of 56656657903 is 30975665665.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 56656657903 - 2³³ = 48066723311 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56656657907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28328328951 + 28328328952.

It is an arithmetic number, because the mean of its divisors is an integer number (28328328952).

Almost surely, 2^56656657903 is an apocalyptic number.

56656657903 is a deficient number, since it is larger than the sum of its proper divisors (1).

56656657903 is an equidigital number, since it uses as much as digits as its factorization.

56656657903 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30618000, while the sum is 58.

The spelling of 56656657903 in words is "fifty-six billion, six hundred fifty-six million, six hundred fifty-seven thousand, nine hundred three".