79842178674 has 12 divisors (see below), whose sum is σ = 172991387166. Its totient is φ = 26614059552.

The previous prime is 79842178583. The next prime is 79842178687. The reversal of 79842178674 is 47687124897.

79842178674 is a `hidden beast` number, since 79 + 8 + 421 + 78 + 6 + 74 = 666.

It can be written as a sum of positive squares in only one way, i.e., 79447878225 + 394300449 = 281865^2 + 19857^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2217838279 + ... + 2217838314.

Almost surely, 2^79842178674 is an apocalyptic number.

79842178674 is an abundant number, since it is smaller than the sum of its proper divisors (93149208492).

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

79842178674 is a wasteful number, since it uses less digits than its factorization.

79842178674 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4435676601 (or 4435676598 counting only the distinct ones).

The product of its digits is 37933056, while the sum is 63.

The spelling of 79842178674 in words is "seventy-nine billion, eight hundred forty-two million, one hundred seventy-eight thousand, six hundred seventy-four".