198099029844 has 72 divisors (see below), whose sum is σ = 506519493480. Its totient is φ = 65272660992.

The previous prime is 198099029827. The next prime is 198099029861. The reversal of 198099029844 is 448920990891.

It is an interprime number because it is at equal distance from previous prime (198099029827) and next prime (198099029861).

It can be written as a sum of positive squares in 4 ways, for example, as 49150890000 + 148948139844 = 221700^2 + 385938^2 .

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 15875992 + ... + 15888464.

It is an arithmetic number, because the mean of its divisors is an integer number (7034992965).

Almost surely, 2^198099029844 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 198099029844, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (253259746740).

198099029844 is an abundant number, since it is smaller than the sum of its proper divisors (308420463636).

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

198099029844 is a wasteful number, since it uses less digits than its factorization.

198099029844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17529 (or 17524 counting only the distinct ones).

The product of its (nonzero) digits is 13436928, while the sum is 63.

The spelling of 198099029844 in words is "one hundred ninety-eight billion, ninety-nine million, twenty-nine thousand, eight hundred forty-four".