90900165237 has 128 divisors (see below), whose sum is σ = 151910400000. Its totient is φ = 48185819136.

The previous prime is 90900165229. The next prime is 90900165259. The reversal of 90900165237 is 73256100909.

It is not a de Polignac number, because 90900165237 - 2³ = 90900165229 is a prime.

It is a super-2 number, since 2×90900165237² (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 (90900165287) 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 127 ways as a sum of consecutive naturals, for example, 353697013 + ... + 353697269.

It is an arithmetic number, because the mean of its divisors is an integer number (1186800000).

Almost surely, 2^90900165237 is an apocalyptic number.

It is an amenable number.

90900165237 is a deficient number, since it is larger than the sum of its proper divisors (61010234763).

90900165237 is a wasteful number, since it uses less digits than its factorization.

90900165237 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 608 (or 594 counting only the distinct ones).

The product of its (nonzero) digits is 102060, while the sum is 42.

The spelling of 90900165237 in words is "ninety billion, nine hundred million, one hundred sixty-five thousand, two hundred thirty-seven".