77918404513764 has 24 divisors (see below), whose sum is σ = 182030521382080. Its totient is φ = 25941242811744.

The previous prime is 77918404513757. The next prime is 77918404513823. The reversal of 77918404513764 is 46731540481977.

It is a junction number, because it is equal to n+sod(n) for n = 77918404513695 and 77918404513704.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3944826319 + ... + 3944846070.

Almost surely, 2^{77918404513764} is an apocalyptic number.

It is an amenable number.

77918404513764 is an abundant number, since it is smaller than the sum of its proper divisors (104112116868316).

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

77918404513764 is a wasteful number, since it uses less digits than its factorization.

77918404513764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7889673219 (or 7889673217 counting only the distinct ones).

The product of its (nonzero) digits is 142248960, while the sum is 66.

The spelling of 77918404513764 in words is "seventy-seven trillion, nine hundred eighteen billion, four hundred four million, five hundred thirteen thousand, seven hundred sixty-four".