198437643512 has 64 divisors (see below), whose sum is σ = 379157760000. Its totient is φ = 97351410816.

The previous prime is 198437643511. The next prime is 198437643577. The reversal of 198437643512 is 215346734891.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198437643511) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39006233 + ... + 39011319.

It is an arithmetic number, because the mean of its divisors is an integer number (5924340000).

Almost surely, 2^198437643512 is an apocalyptic number.

It is an amenable number.

198437643512 is a deficient number, since it is larger than the sum of its proper divisors (180720116488).

198437643512 is a wasteful number, since it uses less digits than its factorization.

198437643512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5628 (or 5624 counting only the distinct ones).

The product of its digits is 4354560, while the sum is 53.

The spelling of 198437643512 in words is "one hundred ninety-eight billion, four hundred thirty-seven million, six hundred forty-three thousand, five hundred twelve".