79019884909 has 32 divisors (see below), whose sum is σ = 97627852800. Its totient is φ = 62449548480.

The previous prime is 79019884903. The next prime is 79019884919. The reversal of 79019884909 is 90948891097.

It is a cyclic number.

It is not a de Polignac number, because 79019884909 - 2¹⁵ = 79019852141 is a prime.

It is a super-2 number, since 2×79019884909² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79019884903) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1083619 + ... + 1154239.

It is an arithmetic number, because the mean of its divisors is an integer number (3050870400).

Almost surely, 2^79019884909 is an apocalyptic number.

It is an amenable number.

79019884909 is a deficient number, since it is larger than the sum of its proper divisors (18607967891).

79019884909 is a wasteful number, since it uses less digits than its factorization.

79019884909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70873.

The product of its (nonzero) digits is 11757312, while the sum is 64.

The spelling of 79019884909 in words is "seventy-nine billion, nineteen million, eight hundred eighty-four thousand, nine hundred nine".