78518525928 has 32 divisors (see below), whose sum is σ = 196312779360. Its totient is φ = 26170646720.

The previous prime is 78518525927. The next prime is 78518525947. The reversal of 78518525928 is 82952581587.

It is a super-2 number, since 2×78518525928² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78518525927) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 168826 + ... + 430742.

It is an arithmetic number, because the mean of its divisors is an integer number (6134774355).

Almost surely, 2^78518525928 is an apocalyptic number.

It is an amenable number.

78518525928 is an abundant number, since it is smaller than the sum of its proper divisors (117794253432).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78518525928 is a wasteful number, since it uses less digits than its factorization.

78518525928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274417 (or 274413 counting only the distinct ones).

The product of its digits is 16128000, while the sum is 60.

The spelling of 78518525928 in words is "seventy-eight billion, five hundred eighteen million, five hundred twenty-five thousand, nine hundred twenty-eight".