79343885509 has 4 divisors (see below), whose sum is σ = 90678726304. Its totient is φ = 68009044716.

The previous prime is 79343885503. The next prime is 79343885641. The reversal of 79343885509 is 90558834397.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 90558834397 = 39581 ⋅2287937.

It is a cyclic number.

It is not a de Polignac number, because 79343885509 - 2¹⁷ = 79343754437 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 (79343885503) 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, 5667420387 + ... + 5667420400.

It is an arithmetic number, because the mean of its divisors is an integer number (22669681576).

Almost surely, 2^79343885509 is an apocalyptic number.

It is an amenable number.

79343885509 is a deficient number, since it is larger than the sum of its proper divisors (11334840795).

79343885509 is a wasteful number, since it uses less digits than its factorization.

79343885509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11334840794.

The product of its (nonzero) digits is 32659200, while the sum is 61.

The spelling of 79343885509 in words is "seventy-nine billion, three hundred forty-three million, eight hundred eighty-five thousand, five hundred nine".