90199191181 has 12 divisors (see below), whose sum is σ = 99183952000. Its totient is φ = 81966689640.

The previous prime is 90199191179. The next prime is 90199191253. The reversal of 90199191181 is 18119199109.

It is not a de Polignac number, because 90199191181 - 2¹ = 90199191179 is a prime.

It is a super-2 number, since 2×90199191181² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90199191161) 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, 160420 + ... + 454018.

Almost surely, 2^90199191181 is an apocalyptic number.

It is an amenable number.

90199191181 is a deficient number, since it is larger than the sum of its proper divisors (8984760819).

90199191181 is a wasteful number, since it uses less digits than its factorization.

90199191181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 296160 (or 296149 counting only the distinct ones).

The product of its (nonzero) digits is 52488, while the sum is 49.

The spelling of 90199191181 in words is "ninety billion, one hundred ninety-nine million, one hundred ninety-one thousand, one hundred eighty-one".