91176814081 has 4 divisors (see below), whose sum is σ = 94118001664. Its totient is φ = 88235626500.

The previous prime is 91176814067. The next prime is 91176814147. The reversal of 91176814081 is 18041867119.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 91176814081 - 2⁷ = 91176813953 is a prime.

It is a super-2 number, since 2×91176814081² (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 (91177814081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1470593745 + ... + 1470593806.

It is an arithmetic number, because the mean of its divisors is an integer number (23529500416).

Almost surely, 2^91176814081 is an apocalyptic number.

It is an amenable number.

91176814081 is a deficient number, since it is larger than the sum of its proper divisors (2941187583).

91176814081 is a wasteful number, since it uses less digits than its factorization.

91176814081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2941187582.

The product of its (nonzero) digits is 96768, while the sum is 46.

The spelling of 91176814081 in words is "ninety-one billion, one hundred seventy-six million, eight hundred fourteen thousand, eighty-one".