79947381144 has 32 divisors (see below), whose sum is σ = 200081815920. Its totient is φ = 26620678656.

The previous prime is 79947381133. The next prime is 79947381187. The reversal of 79947381144 is 44118374997.

It is a happy number.

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, 1755069 + ... + 1800044.

Almost surely, 2^79947381144 is an apocalyptic number.

It is an amenable number.

79947381144 is an abundant number, since it is smaller than the sum of its proper divisors (120134434776).

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

79947381144 is a wasteful number, since it uses less digits than its factorization.

79947381144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3556059 (or 3556055 counting only the distinct ones).

The product of its digits is 6096384, while the sum is 57.

The spelling of 79947381144 in words is "seventy-nine billion, nine hundred forty-seven million, three hundred eighty-one thousand, one hundred forty-four".