90161732436 has 12 divisors (see below), whose sum is σ = 210377375712. Its totient is φ = 30053910808.

The previous prime is 90161732417. The next prime is 90161732447. The reversal of 90161732436 is 63423716109.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3756738840 + ... + 3756738863.

It is an arithmetic number, because the mean of its divisors is an integer number (17531447976).

Almost surely, 2^90161732436 is an apocalyptic number.

It is an amenable number.

90161732436 is an abundant number, since it is smaller than the sum of its proper divisors (120215643276).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

90161732436 is a wasteful number, since it uses less digits than its factorization.

90161732436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7513477710 (or 7513477708 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 42.

The spelling of 90161732436 in words is "ninety billion, one hundred sixty-one million, seven hundred thirty-two thousand, four hundred thirty-six".