91450732331 has 32 divisors (see below), whose sum is σ = 118160114688. Its totient is φ = 68926556160.

The previous prime is 91450732279. The next prime is 91450732363. The reversal of 91450732331 is 13323705419.

It is not a de Polignac number, because 91450732331 - 2³⁰ = 90376990507 is a prime.

It is a super-2 number, since 2×91450732331² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (91450731331) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 270830 + ... + 506211.

It is an arithmetic number, because the mean of its divisors is an integer number (3692503584).

Almost surely, 2^91450732331 is an apocalyptic number.

91450732331 is a deficient number, since it is larger than the sum of its proper divisors (26709382357).

91450732331 is a wasteful number, since it uses less digits than its factorization.

91450732331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 777131.

The product of its (nonzero) digits is 68040, while the sum is 38.

The spelling of 91450732331 in words is "ninety-one billion, four hundred fifty million, seven hundred thirty-two thousand, three hundred thirty-one".