78691288125 has 40 divisors (see below), whose sum is σ = 132053854240. Its totient is φ = 41666616000.

The previous prime is 78691288103. The next prime is 78691288129. The reversal of 78691288125 is 52188219687.

It is not a de Polignac number, because 78691288125 - 2⁶ = 78691288061 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78691288129) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 109659 + ... + 411591.

It is an arithmetic number, because the mean of its divisors is an integer number (3301346356).

Almost surely, 2^78691288125 is an apocalyptic number.

78691288125 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

78691288125 is a deficient number, since it is larger than the sum of its proper divisors (53362566115).

78691288125 is a wasteful number, since it uses less digits than its factorization.

78691288125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302095 (or 302080 counting only the distinct ones).

The product of its digits is 3870720, while the sum is 57.

The spelling of 78691288125 in words is "seventy-eight billion, six hundred ninety-one million, two hundred eighty-eight thousand, one hundred twenty-five".