79640174880 has 144 divisors (see below), whose sum is σ = 310596721344. Its totient is φ = 18203466240.

The previous prime is 79640174851. The next prime is 79640174891. The reversal of 79640174880 is 8847104697.

It is a happy number.

79640174880 is a `hidden beast` number, since 7 + 96 + 401 + 74 + 8 + 80 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3940326 + ... + 3960485.

It is an arithmetic number, because the mean of its divisors is an integer number (2156921676).

Almost surely, 2^79640174880 is an apocalyptic number.

79640174880 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

79640174880 is an abundant number, since it is smaller than the sum of its proper divisors (230956546464).

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

79640174880 is a wasteful number, since it uses less digits than its factorization.

79640174880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7900839 (or 7900828 counting only the distinct ones).

The product of its (nonzero) digits is 2709504, while the sum is 54.

The spelling of 79640174880 in words is "seventy-nine billion, six hundred forty million, one hundred seventy-four thousand, eight hundred eighty".