79909318591 has 8 divisors (see below), whose sum is σ = 80553482240. Its totient is φ = 79265388888.

The previous prime is 79909318583. The next prime is 79909318603. The reversal of 79909318591 is 19581390997.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 79909318591 - 2³ = 79909318583 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79903318591) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 663100 + ... + 774286.

It is an arithmetic number, because the mean of its divisors is an integer number (10069185280).

Almost surely, 2^79909318591 is an apocalyptic number.

79909318591 is a deficient number, since it is larger than the sum of its proper divisors (644163649).

79909318591 is a wasteful number, since it uses less digits than its factorization.

79909318591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116973.

The product of its (nonzero) digits is 5511240, while the sum is 61.

The spelling of 79909318591 in words is "seventy-nine billion, nine hundred nine million, three hundred eighteen thousand, five hundred ninety-one".