79386856491 has 8 divisors (see below), whose sum is σ = 108101251584. Its totient is φ = 51798516200.

The previous prime is 79386856387. The next prime is 79386856531. The reversal of 79386856491 is 19465868397.

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 79386856491 - 2¹⁰ = 79386855467 is a prime.

It is not an unprimeable number, because it can be changed into a prime (79386856291) 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, 281513535 + ... + 281513816.

It is an arithmetic number, because the mean of its divisors is an integer number (13512656448).

Almost surely, 2^79386856491 is an apocalyptic number.

79386856491 is a deficient number, since it is larger than the sum of its proper divisors (28714395093).

79386856491 is a wasteful number, since it uses less digits than its factorization.

79386856491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 563027401.

The product of its digits is 78382080, while the sum is 66.

The spelling of 79386856491 in words is "seventy-nine billion, three hundred eighty-six million, eight hundred fifty-six thousand, four hundred ninety-one".