91812941361 has 12 divisors (see below), whose sum is σ = 133147057680. Its totient is φ = 60964767000.

The previous prime is 91812941351. The next prime is 91812941401. The reversal of 91812941361 is 16314921819.

It is not a de Polignac number, because 91812941361 - 2⁵ = 91812941329 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (91812941351) 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 11 ways as a sum of consecutive naturals, for example, 20319331 + ... + 20323848.

It is an arithmetic number, because the mean of its divisors is an integer number (11095588140).

Almost surely, 2^91812941361 is an apocalyptic number.

It is an amenable number.

91812941361 is a deficient number, since it is larger than the sum of its proper divisors (41334116319).

91812941361 is a wasteful number, since it uses less digits than its factorization.

91812941361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40643436 (or 40643433 counting only the distinct ones).

The product of its digits is 93312, while the sum is 45.

The spelling of 91812941361 in words is "ninety-one billion, eight hundred twelve million, nine hundred forty-one thousand, three hundred sixty-one".