79999011011 has 4 divisors (see below), whose sum is σ = 81011656800. Its totient is φ = 78986365224.

The previous prime is 79999010989. The next prime is 79999011013. The reversal of 79999011011 is 11011099997.

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 79999011011 - 2³⁰ = 78925269187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79999011013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 506322776 + ... + 506322933.

It is an arithmetic number, because the mean of its divisors is an integer number (20252914200).

Almost surely, 2^79999011011 is an apocalyptic number.

79999011011 is a deficient number, since it is larger than the sum of its proper divisors (1012645789).

79999011011 is a wasteful number, since it uses less digits than its factorization.

79999011011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1012645788.

The product of its (nonzero) digits is 45927, while the sum is 47.

The spelling of 79999011011 in words is "seventy-nine billion, nine hundred ninety-nine million, eleven thousand, eleven".