82991092799 has 4 divisors (see below), whose sum is σ = 82993701336. Its totient is φ = 82988484264.

The previous prime is 82991092783. The next prime is 82991092823. The reversal of 82991092799 is 99729019928.

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 82991092799 - 2⁴ = 82991092783 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 (82991092729) 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, 1255949 + ... + 1320374.

It is an arithmetic number, because the mean of its divisors is an integer number (20748425334).

Almost surely, 2^82991092799 is an apocalyptic number.

82991092799 is a deficient number, since it is larger than the sum of its proper divisors (2608537).

82991092799 is a wasteful number, since it uses less digits than its factorization.

82991092799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2608536.

The product of its (nonzero) digits is 13226976, while the sum is 65.

The spelling of 82991092799 in words is "eighty-two billion, nine hundred ninety-one million, ninety-two thousand, seven hundred ninety-nine".