80079520865 has 4 divisors (see below), whose sum is σ = 96095425044. Its totient is φ = 64063616688.

The previous prime is 80079520853. The next prime is 80079520897. The reversal of 80079520865 is 56802597008.

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

It can be written as a sum of positive squares in 2 ways, for example, as 62117088289 + 17962432576 = 249233^2 + 134024^2 .

It is a cyclic number.

It is not a de Polignac number, because 80079520865 - 2⁴ = 80079520849 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8007952082 + ... + 8007952091.

It is an arithmetic number, because the mean of its divisors is an integer number (24023856261).

Almost surely, 2^80079520865 is an apocalyptic number.

It is an amenable number.

80079520865 is a deficient number, since it is larger than the sum of its proper divisors (16015904179).

80079520865 is a wasteful number, since it uses less digits than its factorization.

80079520865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16015904178.

The product of its (nonzero) digits is 1209600, while the sum is 50.

The spelling of 80079520865 in words is "eighty billion, seventy-nine million, five hundred twenty thousand, eight hundred sixty-five".