78624736725 has 24 divisors (see below), whose sum is σ = 130001634720. Its totient is φ = 41930374720.

The previous prime is 78624736717. The next prime is 78624736781. The reversal of 78624736725 is 52763742687.

It is not a de Polignac number, because 78624736725 - 2³ = 78624736717 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1576471 + ... + 1625579.

It is an arithmetic number, because the mean of its divisors is an integer number (5416734780).

Almost surely, 2^78624736725 is an apocalyptic number.

78624736725 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

78624736725 is a deficient number, since it is larger than the sum of its proper divisors (51376897995).

78624736725 is a wasteful number, since it uses less digits than its factorization.

78624736725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70469 (or 70464 counting only the distinct ones).

The product of its digits is 23708160, while the sum is 57.

The spelling of 78624736725 in words is "seventy-eight billion, six hundred twenty-four million, seven hundred thirty-six thousand, seven hundred twenty-five".