90107117181 has 12 divisors (see below), whose sum is σ = 135813626208. Its totient is φ = 57459610824.

The previous prime is 90107117171. The next prime is 90107117209. The reversal of 90107117181 is 18171170109.

It is not a de Polignac number, because 90107117181 - 2⁶ = 90107117117 is a prime.

It is a super-2 number, since 2×90107117181² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90107117161) 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, 217649835 + ... + 217650248.

It is an arithmetic number, because the mean of its divisors is an integer number (11317802184).

Almost surely, 2^90107117181 is an apocalyptic number.

It is an amenable number.

90107117181 is a deficient number, since it is larger than the sum of its proper divisors (45706509027).

90107117181 is a wasteful number, since it uses less digits than its factorization.

90107117181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 435300112 (or 435300109 counting only the distinct ones).

The product of its (nonzero) digits is 3528, while the sum is 36.

The spelling of 90107117181 in words is "ninety billion, one hundred seven million, one hundred seventeen thousand, one hundred eighty-one".