9991000202 has 16 divisors (see below), whose sum is σ = 15242031360. Its totient is φ = 4910635488.

The previous prime is 9991000183. The next prime is 9991000207. The reversal of 9991000202 is 2020001999.

It is not an unprimeable number, because it can be changed into a prime (9991000207) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13643 + ... + 142014.

It is an arithmetic number, because the mean of its divisors is an integer number (952626960).

Almost surely, 2^9991000202 is an apocalyptic number.

9991000202 is a deficient number, since it is larger than the sum of its proper divisors (5251031158).

9991000202 is a wasteful number, since it uses less digits than its factorization.

9991000202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156205.

The product of its (nonzero) digits is 2916, while the sum is 32.

The square root of 9991000202 is about 99954.9908808960. The cubic root of 9991000202 is about 2153.7881801440.

The spelling of 9991000202 in words is "nine billion, nine hundred ninety-one million, two hundred two", and thus it is an aban number.