78986854115 has 24 divisors (see below), whose sum is σ = 102699717120. Its totient is φ = 58292642304.

The previous prime is 78986854097. The next prime is 78986854123. The reversal of 78986854115 is 51145868987.

It is a Cunningham number, because it is equal to 281046²-1.

It is not a de Polignac number, because 78986854115 - 2⁸ = 78986853859 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1377131 + ... + 1433339.

It is an arithmetic number, because the mean of its divisors is an integer number (4279154880).

Almost surely, 2^78986854115 is an apocalyptic number.

78986854115 is a deficient number, since it is larger than the sum of its proper divisors (23712863005).

78986854115 is a wasteful number, since it uses less digits than its factorization.

78986854115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57903 (or 57890 counting only the distinct ones).

The product of its digits is 19353600, while the sum is 62.

The spelling of 78986854115 in words is "seventy-eight billion, nine hundred eighty-six million, eight hundred fifty-four thousand, one hundred fifteen".