79777862625 has 64 divisors (see below), whose sum is σ = 139893811200. Its totient is φ = 40263652800.

The previous prime is 79777862621. The next prime is 79777862627. The reversal of 79777862625 is 52626877797.

It is a happy number.

It is not a de Polignac number, because 79777862625 - 2² = 79777862621 is a prime.

It is not an unprimeable number, because it can be changed into a prime (79777862621) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6884086 + ... + 6895664.

It is an arithmetic number, because the mean of its divisors is an integer number (2185840800).

Almost surely, 2^79777862625 is an apocalyptic number.

79777862625 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

79777862625 is a deficient number, since it is larger than the sum of its proper divisors (60115948575).

79777862625 is a wasteful number, since it uses less digits than its factorization.

79777862625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12583 (or 12573 counting only the distinct ones).

The product of its digits is 124467840, while the sum is 66.

The spelling of 79777862625 in words is "seventy-nine billion, seven hundred seventy-seven million, eight hundred sixty-two thousand, six hundred twenty-five".