90099919990 has 16 divisors (see below), whose sum is σ = 162198036000. Its totient is φ = 36035928000.

The previous prime is 90099919937. The next prime is 90099919999. The reversal of 90099919990 is 9991999009.

It is a super-5 number, since 5×90099919990⁵ (a number of 56 digits) contains 55555 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90099919999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 410490 + ... + 590509.

It is an arithmetic number, because the mean of its divisors is an integer number (10137377250).

Almost surely, 2^90099919990 is an apocalyptic number.

90099919990 is a deficient number, since it is larger than the sum of its proper divisors (72098116010).

90099919990 is a wasteful number, since it uses less digits than its factorization.

90099919990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1010007.

The product of its (nonzero) digits is 4782969, while the sum is 64.

The spelling of 90099919990 in words is "ninety billion, ninety-nine million, nine hundred nineteen thousand, nine hundred ninety".