9900355590 has 24 divisors (see below), whose sum is σ = 25740924768. Its totient is φ = 2640094800.

The previous prime is 9900355541. The next prime is 9900355607. The reversal of 9900355590 is 955530099.

9900355590 is a `hidden beast` number, since 9 + 9 + 0 + 0 + 3 + 55 + 590 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 55001886 + ... + 55002065.

It is an arithmetic number, because the mean of its divisors is an integer number (1072538532).

Almost surely, 2^9900355590 is an apocalyptic number.

9900355590 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

9900355590 is an abundant number, since it is smaller than the sum of its proper divisors (15840569178).

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

9900355590 is a wasteful number, since it uses less digits than its factorization.

9900355590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110003964 (or 110003961 counting only the distinct ones).

The product of its (nonzero) digits is 273375, while the sum is 45.

The square root of 9900355590 is about 99500.5306016003. The cubic root of 9900355590 is about 2147.2548769004.

The spelling of 9900355590 in words is "nine billion, nine hundred million, three hundred fifty-five thousand, five hundred ninety".