56172888973 has 2 divisors, whose sum is σ = 56172888974. Its totient is φ = 56172888972.

The previous prime is 56172888953. The next prime is 56172889033. The reversal of 56172888973 is 37988827165.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53867160649 + 2305728324 = 232093^2 + 48018^2 .

It is a cyclic number.

It is not a de Polignac number, because 56172888973 - 2²⁵ = 56139334541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56172888953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28086444486 + 28086444487.

It is an arithmetic number, because the mean of its divisors is an integer number (28086444487).

Almost surely, 2^56172888973 is an apocalyptic number.

It is an amenable number.

56172888973 is a deficient number, since it is larger than the sum of its proper divisors (1).

56172888973 is an equidigital number, since it uses as much as digits as its factorization.

56172888973 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40642560, while the sum is 64.

The spelling of 56172888973 in words is "fifty-six billion, one hundred seventy-two million, eight hundred eighty-eight thousand, nine hundred seventy-three".