78501925725 has 12 divisors (see below), whose sum is σ = 129789850656. Its totient is φ = 41867693680.

The previous prime is 78501925703. The next prime is 78501925739. The reversal of 78501925725 is 52752910587.

It is not a de Polignac number, because 78501925725 - 2⁷ = 78501925597 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 523346097 + ... + 523346246.

It is an arithmetic number, because the mean of its divisors is an integer number (10815820888).

Almost surely, 2^78501925725 is an apocalyptic number.

78501925725 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

78501925725 is a deficient number, since it is larger than the sum of its proper divisors (51287924931).

78501925725 is a wasteful number, since it uses less digits than its factorization.

78501925725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1046692356 (or 1046692351 counting only the distinct ones).

The product of its (nonzero) digits is 1764000, while the sum is 51.

The spelling of 78501925725 in words is "seventy-eight billion, five hundred one million, nine hundred twenty-five thousand, seven hundred twenty-five".