91736900161 has 9 divisors (see below), whose sum is σ = 92444050881. Its totient is φ = 91035124884.

The previous prime is 91736900153. The next prime is 91736900173. The reversal of 91736900161 is 16100963719.

The square root of 91736900161 is 302881.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 91736900161 - 2³ = 91736900153 is a prime.

It is a super-2 number, since 2×91736900161² (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 (91736900141) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 42099370 + ... + 42101548.

It is an arithmetic number, because the mean of its divisors is an integer number (10271561209).

Almost surely, 2^91736900161 is an apocalyptic number.

91736900161 is the 302881-st square number.

91736900161 is the 151441-st centered octagonal number.

It is an amenable number.

91736900161 is a deficient number, since it is larger than the sum of its proper divisors (707150720).

91736900161 is an frugal number, since it uses more digits than its factorization.

91736900161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4636 (or 2318 counting only the distinct ones).

The product of its (nonzero) digits is 61236, while the sum is 43.

The spelling of 91736900161 in words is "ninety-one billion, seven hundred thirty-six million, nine hundred thousand, one hundred sixty-one".