56777895687 has 4 divisors (see below), whose sum is σ = 75703860920. Its totient is φ = 37851930456.

The previous prime is 56777895679. The next prime is 56777895709. The reversal of 56777895687 is 78659877765.

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

It is not a de Polignac number, because 56777895687 - 2³ = 56777895679 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56777895607) 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, 9462982612 + ... + 9462982617.

It is an arithmetic number, because the mean of its divisors is an integer number (18925965230).

Almost surely, 2^56777895687 is an apocalyptic number.

56777895687 is a deficient number, since it is larger than the sum of its proper divisors (18925965233).

56777895687 is a wasteful number, since it uses less digits than its factorization.

56777895687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18925965232.

The product of its digits is 1244678400, while the sum is 75.

The spelling of 56777895687 in words is "fifty-six billion, seven hundred seventy-seven million, eight hundred ninety-five thousand, six hundred eighty-seven".