79655589659 has 4 divisors (see below), whose sum is σ = 82402334160. Its totient is φ = 76908845160.

The previous prime is 79655589647. The next prime is 79655589709. The reversal of 79655589659 is 95698555697.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79655589659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79655589059) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1373372207 + ... + 1373372264.

It is an arithmetic number, because the mean of its divisors is an integer number (20600583540).

Almost surely, 2^79655589659 is an apocalyptic number.

79655589659 is a deficient number, since it is larger than the sum of its proper divisors (2746744501).

79655589659 is a wasteful number, since it uses less digits than its factorization.

79655589659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2746744500.

The product of its digits is 918540000, while the sum is 74.

The spelling of 79655589659 in words is "seventy-nine billion, six hundred fifty-five million, five hundred eighty-nine thousand, six hundred fifty-nine".