90909091600 has 120 divisors (see below), whose sum is σ = 229360409280. Its totient is φ = 34560514560.

The previous prime is 90909091579. The next prime is 90909091601. The reversal of 90909091600 is 619090909.

It is not an unprimeable number, because it can be changed into a prime (90909091601) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1412931 + ... + 1475869.

It is an arithmetic number, because the mean of its divisors is an integer number (1911336744).

Almost surely, 2^90909091600 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 90909091600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (114680204640).

90909091600 is an abundant number, since it is smaller than the sum of its proper divisors (138451317680).

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

90909091600 is a wasteful number, since it uses less digits than its factorization.

90909091600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63137 (or 63126 counting only the distinct ones).

The product of its (nonzero) digits is 39366, while the sum is 43.

The spelling of 90909091600 in words is "ninety billion, nine hundred nine million, ninety-one thousand, six hundred".