78881655328120 has 32 divisors (see below), whose sum is σ = 183603852921600. Its totient is φ = 30464639298688.

The previous prime is 78881655328067. The next prime is 78881655328127. The reversal of 78881655328120 is 2182355618887.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78881655328127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34000712344 + ... + 34000714663.

It is an arithmetic number, because the mean of its divisors is an integer number (5737620403800).

Almost surely, 2^{78881655328120} is an apocalyptic number.

It is an amenable number.

78881655328120 is an abundant number, since it is smaller than the sum of its proper divisors (104722197593480).

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

78881655328120 is a wasteful number, since it uses less digits than its factorization.

78881655328120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68001427047 (or 68001427043 counting only the distinct ones).

The product of its (nonzero) digits is 51609600, while the sum is 64.

The spelling of 78881655328120 in words is "seventy-eight trillion, eight hundred eighty-one billion, six hundred fifty-five million, three hundred twenty-eight thousand, one hundred twenty".