91409371227 has 12 divisors (see below), whose sum is σ = 132249762840. Its totient is φ = 60840809568.

The previous prime is 91409371213. The next prime is 91409371289. The reversal of 91409371227 is 72217390419.

91409371227 is a `hidden beast` number, since 91 + 409 + 37 + 122 + 7 = 666.

It is not a de Polignac number, because 91409371227 - 2⁴ = 91409371211 is a prime.

It is not an unprimeable number, because it can be changed into a prime (91409378227) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8225077 + ... + 8236182.

It is an arithmetic number, because the mean of its divisors is an integer number (11020813570).

Almost surely, 2^91409371227 is an apocalyptic number.

91409371227 is a deficient number, since it is larger than the sum of its proper divisors (40840391613).

91409371227 is a wasteful number, since it uses less digits than its factorization.

91409371227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16461882 (or 16461879 counting only the distinct ones).

The product of its (nonzero) digits is 190512, while the sum is 45.

The spelling of 91409371227 in words is "ninety-one billion, four hundred nine million, three hundred seventy-one thousand, two hundred twenty-seven".