91791392270 has 16 divisors (see below), whose sum is σ = 165241252800. Its totient is φ = 36712835424.

The previous prime is 91791392257. The next prime is 91791392299. The reversal of 91791392270 is 7229319719.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 360470 + ... + 559929.

It is an arithmetic number, because the mean of its divisors is an integer number (10327578300).

Almost surely, 2^91791392270 is an apocalyptic number.

91791392270 is a deficient number, since it is larger than the sum of its proper divisors (73449860530).

91791392270 is a wasteful number, since it uses less digits than its factorization.

91791392270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 930379.

The product of its (nonzero) digits is 428652, while the sum is 50.

The spelling of 91791392270 in words is "ninety-one billion, seven hundred ninety-one million, three hundred ninety-two thousand, two hundred seventy".