77313758625 has 24 divisors (see below), whose sum is σ = 139370937576. Its totient is φ = 41234004000.

The previous prime is 77313758623. The next prime is 77313758677. The reversal of 77313758625 is 52685731377.

It is a happy number.

77313758625 is a `hidden beast` number, since 7 + 7 + 3 + 1 + 3 + 7 + 5 + 8 + 625 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 12814013601 + 64499745024 = 113199^2 + 253968^2 .

It is not a de Polignac number, because 77313758625 - 2¹ = 77313758623 is a prime.

It is not an unprimeable number, because it can be changed into a prime (77313758623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34360546 + ... + 34362795.

It is an arithmetic number, because the mean of its divisors is an integer number (5807122399).

Almost surely, 2^77313758625 is an apocalyptic number.

77313758625 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

77313758625 is a deficient number, since it is larger than the sum of its proper divisors (62057178951).

77313758625 is a wasteful number, since it uses less digits than its factorization.

77313758625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68723362 (or 68723349 counting only the distinct ones).

The product of its digits is 7408800, while the sum is 54.

The spelling of 77313758625 in words is "seventy-seven billion, three hundred thirteen million, seven hundred fifty-eight thousand, six hundred twenty-five".