991898000202 has 16 divisors (see below), whose sum is σ = 1983840829920. Its totient is φ = 330625195152.

The previous prime is 991898000201. The next prime is 991898000209. The reversal of 991898000202 is 202000898199.

It is not an unprimeable number, because it can be changed into a prime (991898000201) 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, 1576768 + ... + 2114235.

It is an arithmetic number, because the mean of its divisors is an integer number (123990051870).

Almost surely, 2^991898000202 is an apocalyptic number.

991898000202 is an abundant number, since it is smaller than the sum of its proper divisors (991942829718).

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

991898000202 is a wasteful number, since it uses less digits than its factorization.

991898000202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3735797.

The product of its (nonzero) digits is 186624, while the sum is 48.

The spelling of 991898000202 in words is "nine hundred ninety-one billion, eight hundred ninety-eight million, two hundred two", and thus it is an aban number.