90899135790 has 32 divisors (see below), whose sum is σ = 218198486016. Its totient is φ = 24235262880.

The previous prime is 90899135783. The next prime is 90899135791. The reversal of 90899135790 is 9753199809.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90899135791) 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 15 ways as a sum of consecutive naturals, for example, 116022 + ... + 441881.

It is an arithmetic number, because the mean of its divisors is an integer number (6818702688).

Almost surely, 2^90899135790 is an apocalyptic number.

90899135790 is an abundant number, since it is smaller than the sum of its proper divisors (127299350226).

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

90899135790 is a wasteful number, since it uses less digits than its factorization.

90899135790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 563344.

The product of its (nonzero) digits is 5511240, while the sum is 60.

The spelling of 90899135790 in words is "ninety billion, eight hundred ninety-nine million, one hundred thirty-five thousand, seven hundred ninety".