91261340233 has 8 divisors (see below), whose sum is σ = 107117557952. Its totient is φ = 76109843376.

The previous prime is 91261340179. The next prime is 91261340237. The reversal of 91261340233 is 33204316219.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-91261340233 is a prime.

It is a super-2 number, since 2×91261340233² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91261340237) 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 7 ways as a sum of consecutive naturals, for example, 176179935 + ... + 176180452.

It is an arithmetic number, because the mean of its divisors is an integer number (13389694744).

Almost surely, 2^91261340233 is an apocalyptic number.

It is an amenable number.

91261340233 is a deficient number, since it is larger than the sum of its proper divisors (15856217719).

91261340233 is a wasteful number, since it uses less digits than its factorization.

91261340233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 352360431.

The product of its (nonzero) digits is 23328, while the sum is 34.

The spelling of 91261340233 in words is "ninety-one billion, two hundred sixty-one million, three hundred forty thousand, two hundred thirty-three".