78720394714 has 16 divisors (see below), whose sum is σ = 129248368200. Its totient is φ = 35736874560.

The previous prime is 78720394699. The next prime is 78720394721. The reversal of 78720394714 is 41749302787.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 28417530625 + 50302864089 = 168575^2 + 224283^2 .

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, 24815689 + ... + 24818860.

Almost surely, 2^78720394714 is an apocalyptic number.

78720394714 is a deficient number, since it is larger than the sum of its proper divisors (50527973486).

78720394714 is a wasteful number, since it uses less digits than its factorization.

78720394714 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49634625.

The product of its (nonzero) digits is 2370816, while the sum is 52.

The spelling of 78720394714 in words is "seventy-eight billion, seven hundred twenty million, three hundred ninety-four thousand, seven hundred fourteen".