90168950720 has 112 divisors (see below), whose sum is σ = 220242079200. Its totient is φ = 35150008320.

The previous prime is 90168950701. The next prime is 90168950737. The reversal of 90168950720 is 2705986109.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2106491 + ... + 2148869.

Almost surely, 2^90168950720 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 90168950720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (110121039600).

90168950720 is an abundant number, since it is smaller than the sum of its proper divisors (130073128480).

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

90168950720 is a wasteful number, since it uses less digits than its factorization.

90168950720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42566 (or 42556 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 47.

The spelling of 90168950720 in words is "ninety billion, one hundred sixty-eight million, nine hundred fifty thousand, seven hundred twenty".