78664382192 has 40 divisors (see below), whose sum is σ = 166387267200. Its totient is φ = 35730866880.

The previous prime is 78664382189. The next prime is 78664382233. The reversal of 78664382192 is 29128346687.

It is a congruent number.

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, 86483 + ... + 405965.

It is an arithmetic number, because the mean of its divisors is an integer number (4159681680).

Almost surely, 2^78664382192 is an apocalyptic number.

It is an amenable number.

78664382192 is an abundant number, since it is smaller than the sum of its proper divisors (87722885008).

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

78664382192 is a wasteful number, since it uses less digits than its factorization.

78664382192 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320901 (or 320895 counting only the distinct ones).

The product of its digits is 6967296, while the sum is 56.

The spelling of 78664382192 in words is "seventy-eight billion, six hundred sixty-four million, three hundred eighty-two thousand, one hundred ninety-two".