198942143650 has 12 divisors (see below), whose sum is σ = 370032387282. Its totient is φ = 79576857440.

The previous prime is 198942143623. The next prime is 198942143677. The reversal of 198942143650 is 56341249891.

It is an interprime number because it is at equal distance from previous prime (198942143623) and next prime (198942143677).

It can be written as a sum of positive squares in 3 ways, for example, as 168061462209 + 30880681441 = 409953^2 + 175729^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1989421387 + ... + 1989421486.

Almost surely, 2^198942143650 is an apocalyptic number.

198942143650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

198942143650 is a deficient number, since it is larger than the sum of its proper divisors (171090243632).

198942143650 is a wasteful number, since it uses less digits than its factorization.

198942143650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3978842885 (or 3978842880 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 52.

The spelling of 198942143650 in words is "one hundred ninety-eight billion, nine hundred forty-two million, one hundred forty-three thousand, six hundred fifty".