80949365699 has 4 divisors (see below), whose sum is σ = 81006253536. Its totient is φ = 80892477864.

The previous prime is 80949365677. The next prime is 80949365701. The reversal of 80949365699 is 99656394908.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80949365699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80949365639) 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, 28441784 + ... + 28444629.

It is an arithmetic number, because the mean of its divisors is an integer number (20251563384).

Almost surely, 2^80949365699 is an apocalyptic number.

80949365699 is a deficient number, since it is larger than the sum of its proper divisors (56887837).

80949365699 is a wasteful number, since it uses less digits than its factorization.

80949365699 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56887836.

The product of its (nonzero) digits is 113374080, while the sum is 68.

The spelling of 80949365699 in words is "eighty billion, nine hundred forty-nine million, three hundred sixty-five thousand, six hundred ninety-nine".