79649878278 has 96 divisors (see below), whose sum is σ = 171745111296. Its totient is φ = 24577696000.

The previous prime is 79649878183. The next prime is 79649878313. The reversal of 79649878278 is 87287894697.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 30387808 + ... + 30390428.

It is an arithmetic number, because the mean of its divisors is an integer number (1789011576).

Almost surely, 2^79649878278 is an apocalyptic number.

79649878278 is an abundant number, since it is smaller than the sum of its proper divisors (92095233018).

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

79649878278 is a wasteful number, since it uses less digits than its factorization.

79649878278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2862 (or 2821 counting only the distinct ones).

The product of its digits is 682795008, while the sum is 75.

The spelling of 79649878278 in words is "seventy-nine billion, six hundred forty-nine million, eight hundred seventy-eight thousand, two hundred seventy-eight".