991898000200 has 24 divisors (see below), whose sum is σ = 2306162850930. Its totient is φ = 396759200000.

The previous prime is 991898000131. The next prime is 991898000201. The reversal of 991898000200 is 2000898199.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 954618886116 + 37279114084 = 977046^2 + 193078^2 .

It is not an unprimeable number, because it can be changed into a prime (991898000201) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2479744801 + ... + 2479745200.

Almost surely, 2^991898000200 is an apocalyptic number.

It is an amenable number.

991898000200 is an abundant number, since it is smaller than the sum of its proper divisors (1314264850730).

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

991898000200 is a wasteful number, since it uses less digits than its factorization.

991898000200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4959490017 (or 4959490008 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 46.

Adding to 991898000200 its reverse (2000898199), we get a palindrome (993898898399).

The spelling of 991898000200 in words is "nine hundred ninety-one billion, eight hundred ninety-eight million, two hundred", and thus it is an aban number.