56571390553 has 2 divisors, whose sum is σ = 56571390554. Its totient is φ = 56571390552.

The previous prime is 56571390527. The next prime is 56571390563. The reversal of 56571390553 is 35509317565.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39809427529 + 16761963024 = 199523^2 + 129468^2 .

It is a cyclic number.

It is not a de Polignac number, because 56571390553 - 2⁵ = 56571390521 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 56571390497 and 56571390506.

It is not a weakly prime, because it can be changed into another prime (56571390563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28285695276 + 28285695277.

It is an arithmetic number, because the mean of its divisors is an integer number (28285695277).

Almost surely, 2^56571390553 is an apocalyptic number.

It is an amenable number.

56571390553 is a deficient number, since it is larger than the sum of its proper divisors (1).

56571390553 is an equidigital number, since it uses as much as digits as its factorization.

56571390553 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2126250, while the sum is 49.

The spelling of 56571390553 in words is "fifty-six billion, five hundred seventy-one million, three hundred ninety thousand, five hundred fifty-three".