78568931712 has 64 divisors (see below), whose sum is σ = 211638216960. Its totient is φ = 25820766720.

The previous prime is 78568931711. The next prime is 78568931719. The reversal of 78568931712 is 21713986587.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78568931711) 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, 1413628 + ... + 1468155.

It is an arithmetic number, because the mean of its divisors is an integer number (3306847140).

Almost surely, 2^78568931712 is an apocalyptic number.

It is an amenable number.

78568931712 is an abundant number, since it is smaller than the sum of its proper divisors (133069285248).

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

78568931712 is a wasteful number, since it uses less digits than its factorization.

78568931712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2881871 (or 2881859 counting only the distinct ones).

The product of its digits is 5080320, while the sum is 57.

The spelling of 78568931712 in words is "seventy-eight billion, five hundred sixty-eight million, nine hundred thirty-one thousand, seven hundred twelve".