78319580915 has 16 divisors (see below), whose sum is σ = 94233144960. Its totient is φ = 62489333760.

The previous prime is 78319580881. The next prime is 78319580951. The reversal of 78319580915 is 51908591387.

It is not a de Polignac number, because 78319580915 - 2²⁴ = 78302803699 is a prime.

It is a super-2 number, since 2×78319580915² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11221907 + ... + 11228883.

It is an arithmetic number, because the mean of its divisors is an integer number (5889571560).

Almost surely, 2^78319580915 is an apocalyptic number.

78319580915 is a deficient number, since it is larger than the sum of its proper divisors (15913564045).

78319580915 is a wasteful number, since it uses less digits than its factorization.

78319580915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12622.

The product of its (nonzero) digits is 2721600, while the sum is 56.

The spelling of 78319580915 in words is "seventy-eight billion, three hundred nineteen million, five hundred eighty thousand, nine hundred fifteen".