56577218371 has 4 divisors (see below), whose sum is σ = 56580088032. Its totient is φ = 56574348712.

The previous prime is 56577218351. The next prime is 56577218393. The reversal of 56577218371 is 17381277565.

56577218371 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 56577218371 - 2⁹ = 56577217859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56577218351) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1405051 + ... + 1444756.

It is an arithmetic number, because the mean of its divisors is an integer number (14145022008).

Almost surely, 2^56577218371 is an apocalyptic number.

56577218371 is a deficient number, since it is larger than the sum of its proper divisors (2869661).

56577218371 is a wasteful number, since it uses less digits than its factorization.

56577218371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2869660.

The product of its digits is 2469600, while the sum is 52.

The spelling of 56577218371 in words is "fifty-six billion, five hundred seventy-seven million, two hundred eighteen thousand, three hundred seventy-one".