198442816540 has 12 divisors (see below), whose sum is σ = 416729914776. Its totient is φ = 79377126608.

The previous prime is 198442816529. The next prime is 198442816567. The reversal of 198442816540 is 45618244891.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4961070394 + ... + 4961070433.

It is an arithmetic number, because the mean of its divisors is an integer number (34727492898).

Almost surely, 2^198442816540 is an apocalyptic number.

198442816540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

198442816540 is an abundant number, since it is smaller than the sum of its proper divisors (218287098236).

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

198442816540 is a wasteful number, since it uses less digits than its factorization.

198442816540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9922140836 (or 9922140834 counting only the distinct ones).

The product of its (nonzero) digits is 2211840, while the sum is 52.

The spelling of 198442816540 in words is "one hundred ninety-eight billion, four hundred forty-two million, eight hundred sixteen thousand, five hundred forty".