91271900159 has 16 divisors (see below), whose sum is σ = 100594650624. Its totient is φ = 82120975200.

The previous prime is 91271900149. The next prime is 91271900171. The reversal of 91271900159 is 95100917219.

It is not a de Polignac number, because 91271900159 - 2²⁰ = 91270851583 is a prime.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91271900149) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1997549 + ... + 2042729.

It is an arithmetic number, because the mean of its divisors is an integer number (6287165664).

Almost surely, 2^91271900159 is an apocalyptic number.

91271900159 is a deficient number, since it is larger than the sum of its proper divisors (9322750465).

91271900159 is a wasteful number, since it uses less digits than its factorization.

91271900159 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47078.

The product of its (nonzero) digits is 51030, while the sum is 44.

The spelling of 91271900159 in words is "ninety-one billion, two hundred seventy-one million, nine hundred thousand, one hundred fifty-nine".