79519013659 has 4 divisors (see below), whose sum is σ = 79522809304. Its totient is φ = 79515218016.

The previous prime is 79519013657. The next prime is 79519013669. The reversal of 79519013659 is 95631091597.

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

It is a cyclic number.

It is not a de Polignac number, because 79519013659 - 2¹ = 79519013657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79519013653) 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, 1866222 + ... + 1908355.

It is an arithmetic number, because the mean of its divisors is an integer number (19880702326).

Almost surely, 2^79519013659 is an apocalyptic number.

79519013659 is a deficient number, since it is larger than the sum of its proper divisors (3795645).

79519013659 is a wasteful number, since it uses less digits than its factorization.

79519013659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3795644.

The product of its (nonzero) digits is 2296350, while the sum is 55.

The spelling of 79519013659 in words is "seventy-nine billion, five hundred nineteen million, thirteen thousand, six hundred fifty-nine".