78942617022312 has 80 divisors (see below), whose sum is σ = 221311804695300. Its totient is φ = 26290477566720.

The previous prime is 78942617022289. The next prime is 78942617022323. The reversal of 78942617022312 is 21322071624987.

78942617022312 is a `hidden beast` number, since 7 + 8 + 9 + 4 + 2 + 617 + 0 + 2 + 2 + 3 + 12 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 76952299884516 + 1990317137796 = 8772246^2 + 1410786^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 54206989 + ... + 55644252.

Almost surely, 2^{78942617022312} is an apocalyptic number.

78942617022312 is a gapful number since it is divisible by the number (72) formed by its first and last digit.

It is an amenable number.

78942617022312 is an abundant number, since it is smaller than the sum of its proper divisors (142369187672988).

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

78942617022312 is a wasteful number, since it uses less digits than its factorization.

78942617022312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109852368 (or 109852355 counting only the distinct ones).

The product of its (nonzero) digits is 4064256, while the sum is 54.

The spelling of 78942617022312 in words is "seventy-eight trillion, nine hundred forty-two billion, six hundred seventeen million, twenty-two thousand, three hundred twelve".