78776846418 has 32 divisors (see below), whose sum is σ = 161608934592. Its totient is φ = 25584761600.

The previous prime is 78776846387. The next prime is 78776846437. The reversal of 78776846418 is 81464867787.

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, 23196 + ... + 397607.

It is an arithmetic number, because the mean of its divisors is an integer number (5050279206).

Almost surely, 2^78776846418 is an apocalyptic number.

78776846418 is an abundant number, since it is smaller than the sum of its proper divisors (82832088174).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78776846418 is a wasteful number, since it uses less digits than its factorization.

78776846418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 421610.

The product of its digits is 101154816, while the sum is 66.

The spelling of 78776846418 in words is "seventy-eight billion, seven hundred seventy-six million, eight hundred forty-six thousand, four hundred eighteen".