78238396115 has 64 divisors (see below), whose sum is σ = 110197739520. Its totient is φ = 53134681600.

The previous prime is 78238396087. The next prime is 78238396129. The reversal of 78238396115 is 51169383287.

It is not a de Polignac number, because 78238396115 - 2⁶ = 78238396051 is a prime.

It is a super-2 number, since 2×78238396115² (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 63 ways as a sum of consecutive naturals, for example, 14818046 + ... + 14823324.

It is an arithmetic number, because the mean of its divisors is an integer number (1721839680).

Almost surely, 2^78238396115 is an apocalyptic number.

78238396115 is a deficient number, since it is larger than the sum of its proper divisors (31959343405).

78238396115 is a wasteful number, since it uses less digits than its factorization.

78238396115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5465 (or 5443 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 53.

The spelling of 78238396115 in words is "seventy-eight billion, two hundred thirty-eight million, three hundred ninety-six thousand, one hundred fifteen".