78489357888 has 28 divisors (see below), whose sum is σ = 207669759920. Its totient is φ = 26163119232.

The previous prime is 78489357887. The next prime is 78489357929. The reversal of 78489357888 is 88875398487.

It is not an unprimeable number, because it can be changed into a prime (78489357887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 204399178 + ... + 204399561.

It is an arithmetic number, because the mean of its divisors is an integer number (7416777140).

Almost surely, 2^78489357888 is an apocalyptic number.

It is an amenable number.

78489357888 is an abundant number, since it is smaller than the sum of its proper divisors (129180402032).

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

78489357888 is a wasteful number, since it uses less digits than its factorization.

78489357888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408798754 (or 408798744 counting only the distinct ones).

The product of its digits is 867041280, while the sum is 75.

The spelling of 78489357888 in words is "seventy-eight billion, four hundred eighty-nine million, three hundred fifty-seven thousand, eight hundred eighty-eight".