198799715140 has 48 divisors (see below), whose sum is σ = 460558914480. Its totient is φ = 71612651520.

The previous prime is 198799715117. The next prime is 198799715173. The reversal of 198799715140 is 41517997891.

It can be written as a sum of positive squares in 8 ways, for example, as 128188345156 + 70611369984 = 358034^2 + 265728^2 .

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, 9313905 + ... + 9335224.

It is an arithmetic number, because the mean of its divisors is an integer number (9594977385).

Almost surely, 2^198799715140 is an apocalyptic number.

198799715140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

198799715140 is an abundant number, since it is smaller than the sum of its proper divisors (261759199340).

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

198799715140 is a wasteful number, since it uses less digits than its factorization.

198799715140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18649192 (or 18649190 counting only the distinct ones).

The product of its (nonzero) digits is 5715360, while the sum is 61.

The spelling of 198799715140 in words is "one hundred ninety-eight billion, seven hundred ninety-nine million, seven hundred fifteen thousand, one hundred forty".