80793991399 has 4 divisors (see below), whose sum is σ = 88138899720. Its totient is φ = 73449083080.

The previous prime is 80793991379. The next prime is 80793991429. The reversal of 80793991399 is 99319939708.

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 80793991399 - 2⁵ = 80793991367 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 (80793991379) 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, 3672454144 + ... + 3672454165.

It is an arithmetic number, because the mean of its divisors is an integer number (22034724930).

Almost surely, 2^80793991399 is an apocalyptic number.

80793991399 is a deficient number, since it is larger than the sum of its proper divisors (7344908321).

80793991399 is a wasteful number, since it uses less digits than its factorization.

80793991399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7344908320.

The product of its (nonzero) digits is 29760696, while the sum is 67.

The spelling of 80793991399 in words is "eighty billion, seven hundred ninety-three million, nine hundred ninety-one thousand, three hundred ninety-nine".