56173395571 has 2 divisors, whose sum is σ = 56173395572. Its totient is φ = 56173395570.

The previous prime is 56173395529. The next prime is 56173395611. The reversal of 56173395571 is 17559337165.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 56173395571 - 2⁹ = 56173395059 is a prime.

It is not a weakly prime, because it can be changed into another prime (56173390571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28086697785 + 28086697786.

It is an arithmetic number, because the mean of its divisors is an integer number (28086697786).

Almost surely, 2^56173395571 is an apocalyptic number.

56173395571 is a deficient number, since it is larger than the sum of its proper divisors (1).

56173395571 is an equidigital number, since it uses as much as digits as its factorization.

56173395571 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2976750, while the sum is 52.

The spelling of 56173395571 in words is "fifty-six billion, one hundred seventy-three million, three hundred ninety-five thousand, five hundred seventy-one".