77631813677 has 12 divisors (see below), whose sum is σ = 85348730208. Its totient is φ = 70559577000.

The previous prime is 77631813667. The next prime is 77631813691.

77631813677 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 77631813677 - 2⁴ = 77631813661 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 (77631813667) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 534278 + ... + 663864.

It is an arithmetic number, because the mean of its divisors is an integer number (7112394184).

Almost surely, 2^77631813677 is an apocalyptic number.

It is an amenable number.

77631813677 is a deficient number, since it is larger than the sum of its proper divisors (7716916531).

77631813677 is a wasteful number, since it uses less digits than its factorization.

77631813677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134560 (or 134549 counting only the distinct ones).

The product of its digits is 6223392, while the sum is 56.

The spelling of 77631813677 in words is "seventy-seven billion, six hundred thirty-one million, eight hundred thirteen thousand, six hundred seventy-seven".