77687321839416 has 96 divisors (see below), whose sum is σ = 223693601283360. Its totient is φ = 24302514652416.

The previous prime is 77687321839357. The next prime is 77687321839423. The reversal of 77687321839416 is 61493812378677.

77687321839416 is a `hidden beast` number, since 7 + 7 + 6 + 8 + 7 + 3 + 218 + 394 + 16 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

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, 442484251 + ... + 442659786.

It is an arithmetic number, because the mean of its divisors is an integer number (2330141680035).

Almost surely, 2^{77687321839416} is an apocalyptic number.

It is an amenable number.

77687321839416 is an abundant number, since it is smaller than the sum of its proper divisors (146006279443944).

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

77687321839416 is a wasteful number, since it uses less digits than its factorization.

77687321839416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 885144125 (or 885144118 counting only the distinct ones).

The product of its digits is 512096256, while the sum is 72.

The spelling of 77687321839416 in words is "seventy-seven trillion, six hundred eighty-seven billion, three hundred twenty-one million, eight hundred thirty-nine thousand, four hundred sixteen".