78797109642 has 8 divisors (see below), whose sum is σ = 157594219296. Its totient is φ = 26265703212.

The previous prime is 78797109631. The next prime is 78797109679. The reversal of 78797109642 is 24690179787.

It is a sphenic number, since it is the product of 3 distinct primes.

78797109642 is an admirable number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6566425798 + ... + 6566425809.

It is an arithmetic number, because the mean of its divisors is an integer number (19699277412).

Almost surely, 2^78797109642 is an apocalyptic number.

78797109642 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

78797109642 is a wasteful number, since it uses less digits than its factorization.

78797109642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13132851612.

The product of its (nonzero) digits is 10668672, while the sum is 60.

The spelling of 78797109642 in words is "seventy-eight billion, seven hundred ninety-seven million, one hundred nine thousand, six hundred forty-two".