79791642672 has 80 divisors (see below), whose sum is σ = 236006537472. Its totient is φ = 22755882240.

The previous prime is 79791642631. The next prime is 79791642713. The reversal of 79791642672 is 27624619797.

It is an interprime number because it is at equal distance from previous prime (79791642631) and next prime (79791642713).

It is a super-2 number, since 2×79791642672² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33279 + ... + 400862.

Almost surely, 2^79791642672 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 79791642672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (118003268736).

79791642672 is an abundant number, since it is smaller than the sum of its proper divisors (156214894800).

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

79791642672 is a wasteful number, since it uses less digits than its factorization.

79791642672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434706 (or 434700 counting only the distinct ones).

The product of its digits is 16003008, while the sum is 60.

The spelling of 79791642672 in words is "seventy-nine billion, seven hundred ninety-one million, six hundred forty-two thousand, six hundred seventy-two".