198743440179816 has 128 divisors (see below), whose sum is σ = 630938714112000. Its totient is φ = 56783195833536.

The previous prime is 198743440179793. The next prime is 198743440179859. The reversal of 198743440179816 is 618971044347891.

198743440179816 is a `hidden beast` number, since 1 + 9 + 8 + 7 + 4 + 3 + 440 + 179 + 8 + 1 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 141548865 + ... + 142946031.

It is an arithmetic number, because the mean of its divisors is an integer number (4929208704000).

Almost surely, 2^{198743440179816} is an apocalyptic number.

It is an amenable number.

198743440179816 is an abundant number, since it is smaller than the sum of its proper divisors (432195273932184).

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

198743440179816 is a wasteful number, since it uses less digits than its factorization.

198743440179816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1491268 (or 1491258 counting only the distinct ones).

The product of its (nonzero) digits is 292626432, while the sum is 72.

The spelling of 198743440179816 in words is "one hundred ninety-eight trillion, seven hundred forty-three billion, four hundred forty million, one hundred seventy-nine thousand, eight hundred sixteen".