91261183743 has 72 divisors (see below), whose sum is σ = 143917537920. Its totient is φ = 55661074560.

The previous prime is 91261183729. The next prime is 91261183747. The reversal of 91261183743 is 34738116219.

91261183743 is a `hidden beast` number, since 9 + 1 + 261 + 18 + 374 + 3 = 666.

It is not a de Polignac number, because 91261183743 - 2²⁰ = 91260135167 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91261183747) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 83495505 + ... + 83496597.

Almost surely, 2^91261183743 is an apocalyptic number.

91261183743 is a gapful number since it is divisible by the number (93) formed by its first and last digit.

91261183743 is a deficient number, since it is larger than the sum of its proper divisors (52656354177).

91261183743 is a wasteful number, since it uses less digits than its factorization.

91261183743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1997 (or 1975 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The spelling of 91261183743 in words is "ninety-one billion, two hundred sixty-one million, one hundred eighty-three thousand, seven hundred forty-three".