78912656259 has 16 divisors (see below), whose sum is σ = 106036719360. Its totient is φ = 52198642080.

The previous prime is 78912656239. The next prime is 78912656309. The reversal of 78912656259 is 95265621987.

It is not a de Polignac number, because 78912656259 - 2⁵ = 78912656227 is a prime.

It is not an unprimeable number, because it can be changed into a prime (78912656239) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3462369 + ... + 3485085.

It is an arithmetic number, because the mean of its divisors is an integer number (6627294960).

Almost surely, 2^78912656259 is an apocalyptic number.

78912656259 is a deficient number, since it is larger than the sum of its proper divisors (27124063101).

78912656259 is a wasteful number, since it uses less digits than its factorization.

78912656259 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31690.

The product of its digits is 16329600, while the sum is 60.

The spelling of 78912656259 in words is "seventy-eight billion, nine hundred twelve million, six hundred fifty-six thousand, two hundred fifty-nine".