80969426999 has 4 divisors (see below), whose sum is σ = 81587514360. Its totient is φ = 80351339640.

The previous prime is 80969426981. The next prime is 80969427001. The reversal of 80969426999 is 99962496908.

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 80969426999 - 2⁸ = 80969426743 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 (80969426929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 309043484 + ... + 309043745.

It is an arithmetic number, because the mean of its divisors is an integer number (20396878590).

Almost surely, 2^80969426999 is an apocalyptic number.

80969426999 is a deficient number, since it is larger than the sum of its proper divisors (618087361).

80969426999 is a wasteful number, since it uses less digits than its factorization.

80969426999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 618087360.

The product of its (nonzero) digits is 136048896, while the sum is 71.

The spelling of 80969426999 in words is "eighty billion, nine hundred sixty-nine million, four hundred twenty-six thousand, nine hundred ninety-nine".