776977646779677 has 12 divisors (see below), whose sum is σ = 1205108186842176. Its totient is φ = 443987226731160.

The previous prime is 776977646779669. The next prime is 776977646779681.

776977646779677 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 776977646779677 - 2³ = 776977646779669 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (776977646779657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2642781111349 + ... + 2642781111642.

It is an arithmetic number, because the mean of its divisors is an integer number (100425682236848).

Almost surely, 2^{776977646779677} is an apocalyptic number.

It is an amenable number.

776977646779677 is a deficient number, since it is larger than the sum of its proper divisors (428130540062499).

776977646779677 is a wasteful number, since it uses less digits than its factorization.

776977646779677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5285562223008 (or 5285562223001 counting only the distinct ones).

The product of its digits is 2420662999104, while the sum is 102.

The spelling of 776977646779677 in words is "seven hundred seventy-six trillion, nine hundred seventy-seven billion, six hundred forty-six million, seven hundred seventy-nine thousand, six hundred seventy-seven".