90170194688 has 72 divisors (see below), whose sum is σ = 205980649728. Its totient is φ = 38591788032.

The previous prime is 90170194637. The next prime is 90170194721. The reversal of 90170194688 is 88649107109.

It is a super-3 number, since 3×90170194688³ (a number of 34 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1297595 + ... + 1365317.

Almost surely, 2^90170194688 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 90170194688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102990324864).

90170194688 is an abundant number, since it is smaller than the sum of its proper divisors (115810455040).

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

90170194688 is an equidigital number, since it uses as much as digits as its factorization.

90170194688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68489 (or 68475 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 53.

The spelling of 90170194688 in words is "ninety billion, one hundred seventy million, one hundred ninety-four thousand, six hundred eighty-eight".