56779697765 has 16 divisors (see below), whose sum is σ = 77887813248. Its totient is φ = 38925393216.

The previous prime is 56779697761. The next prime is 56779697771.

56779697765 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 56779697765 - 2² = 56779697761 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 56779697692 and 56779697701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56779697761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41867 + ... + 339576.

It is an arithmetic number, because the mean of its divisors is an integer number (4867988328).

Almost surely, 2^56779697765 is an apocalyptic number.

It is an amenable number.

56779697765 is a deficient number, since it is larger than the sum of its proper divisors (21108115483).

56779697765 is a wasteful number, since it uses less digits than its factorization.

56779697765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 385708.

The product of its digits is 1050197400, while the sum is 74.

The spelling of 56779697765 in words is "fifty-six billion, seven hundred seventy-nine million, six hundred ninety-seven thousand, seven hundred sixty-five".