77838630777 has 16 divisors (see below), whose sum is σ = 115389956160. Its totient is φ = 51859360800.

The previous prime is 77838630761. The next prime is 77838630781. The reversal of 77838630777 is 77703683877.

It is not a de Polignac number, because 77838630777 - 2⁴ = 77838630761 is a prime.

It is not an unprimeable number, because it can be changed into a prime (77838630707) 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, 875124 + ... + 959957.

It is an arithmetic number, because the mean of its divisors is an integer number (7211872260).

Almost surely, 2^77838630777 is an apocalyptic number.

It is an amenable number.

77838630777 is a deficient number, since it is larger than the sum of its proper divisors (37551325383).

77838630777 is a wasteful number, since it uses less digits than its factorization.

77838630777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1836661 (or 1836655 counting only the distinct ones).

The product of its (nonzero) digits is 58084992, while the sum is 63.

The spelling of 77838630777 in words is "seventy-seven billion, eight hundred thirty-eight million, six hundred thirty thousand, seven hundred seventy-seven".