779776677977 has 16 divisors (see below), whose sum is σ = 875130542208. Its totient is φ = 688760042880.

The previous prime is 779776677971. The next prime is 779776678033.

779776677977 is nontrivially palindromic in base 10.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-779776677977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (779776677971) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6432788 + ... + 6552885.

It is an arithmetic number, because the mean of its divisors is an integer number (54695658888).

Almost surely, 2^779776677977 is an apocalyptic number.

It is an amenable number.

779776677977 is a deficient number, since it is larger than the sum of its proper divisors (95353864231).

779776677977 is a wasteful number, since it uses less digits than its factorization.

779776677977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12985840.

The product of its digits is 16810159716, while the sum is 86.

The spelling of 779776677977 in words is "seven hundred seventy-nine billion, seven hundred seventy-six million, six hundred seventy-seven thousand, nine hundred seventy-seven".