9901918500 has 48 divisors (see below), whose sum is σ = 28834391040. Its totient is φ = 2640511200.

The previous prime is 9901918471. The next prime is 9901918517. The reversal of 9901918500 is 58191099.

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, 3299140 + ... + 3302139.

It is an arithmetic number, because the mean of its divisors is an integer number (600716480).

Almost surely, 2^9901918500 is an apocalyptic number.

It is an amenable number.

9901918500 is an abundant number, since it is smaller than the sum of its proper divisors (18932472540).

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

9901918500 is a wasteful number, since it uses less digits than its factorization.

9901918500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6601301 (or 6601289 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 42.

The square root of 9901918500 is about 99508.3840688814. The cubic root of 9901918500 is about 2147.3678623889.

The spelling of 9901918500 in words is "nine billion, nine hundred one million, nine hundred eighteen thousand, five hundred".