78507432135684 has 48 divisors (see below), whose sum is σ = 204232455315840. Its totient is φ = 26079829549920.

The previous prime is 78507432135679. The next prime is 78507432135701. The reversal of 78507432135684 is 48653123470587.

It is a happy number.

78507432135684 is a `hidden beast` number, since 7 + 8 + 5 + 0 + 7 + 43 + 21 + 3 + 568 + 4 = 666.

78507432135684 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×78507432135684² (a number of 29 digits) contains 22 as substring.

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, 1240447312 + ... + 1240510599.

It is an arithmetic number, because the mean of its divisors is an integer number (4254842819080).

Almost surely, 2^{78507432135684} is an apocalyptic number.

It is an amenable number.

78507432135684 is an abundant number, since it is smaller than the sum of its proper divisors (125725023180156).

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

78507432135684 is a wasteful number, since it uses less digits than its factorization.

78507432135684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2480958217 (or 2480958209 counting only the distinct ones).

The product of its (nonzero) digits is 135475200, while the sum is 63.

The spelling of 78507432135684 in words is "seventy-eight trillion, five hundred seven billion, four hundred thirty-two million, one hundred thirty-five thousand, six hundred eighty-four".