78857553712 has 40 divisors (see below), whose sum is σ = 174627199136. Its totient is φ = 33793376256.

The previous prime is 78857553707. The next prime is 78857553721. The reversal of 78857553712 is 21735575887.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2045398 + ... + 2083594.

Almost surely, 2^78857553712 is an apocalyptic number.

It is an amenable number.

78857553712 is an abundant number, since it is smaller than the sum of its proper divisors (95769645424).

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

78857553712 is a wasteful number, since it uses less digits than its factorization.

78857553712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56645 (or 56639 counting only the distinct ones).

The product of its digits is 16464000, while the sum is 58.

The spelling of 78857553712 in words is "seventy-eight billion, eight hundred fifty-seven million, five hundred fifty-three thousand, seven hundred twelve".