78907863879 has 80 divisors (see below), whose sum is σ = 130311180384. Its totient is φ = 47285856000.

The previous prime is 78907863877. The next prime is 78907863907. The reversal of 78907863879 is 97836870987.

It is not a de Polignac number, because 78907863879 - 2¹ = 78907863877 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78907863877) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 6481452 + ... + 6493614.

Almost surely, 2^78907863879 is an apocalyptic number.

78907863879 is a deficient number, since it is larger than the sum of its proper divisors (51403316505).

78907863879 is a wasteful number, since it uses less digits than its factorization.

78907863879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12350 (or 12341 counting only the distinct ones).

The product of its (nonzero) digits is 256048128, while the sum is 72.

The spelling of 78907863879 in words is "seventy-eight billion, nine hundred seven million, eight hundred sixty-three thousand, eight hundred seventy-nine".