79417712891 has 8 divisors (see below), whose sum is σ = 86791397184. Its totient is φ = 72069677320.

The previous prime is 79417712887. The next prime is 79417712893. The reversal of 79417712891 is 19821771497.

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 79417712891 - 2² = 79417712887 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79417712893) 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, 6405701 + ... + 6418086.

It is an arithmetic number, because the mean of its divisors is an integer number (10848924648).

Almost surely, 2^79417712891 is an apocalyptic number.

79417712891 is a deficient number, since it is larger than the sum of its proper divisors (7373684293).

79417712891 is a wasteful number, since it uses less digits than its factorization.

79417712891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12824361.

The product of its digits is 1778112, while the sum is 56.

The spelling of 79417712891 in words is "seventy-nine billion, four hundred seventeen million, seven hundred twelve thousand, eight hundred ninety-one".