198625811984 has 10 divisors (see below), whose sum is σ = 384837510750. Its totient is φ = 99312905984.

The previous prime is 198625811983. The next prime is 198625812031. The reversal of 198625811984 is 489118526891.

It can be written as a sum of positive squares in only one way, i.e., 103601584384 + 95024227600 = 321872^2 + 308260^2 .

It is not an unprimeable number, because it can be changed into a prime (198625811983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6207056609 + ... + 6207056640.

It is an arithmetic number, because the mean of its divisors is an integer number (38483751075).

Almost surely, 2^198625811984 is an apocalyptic number.

It is an amenable number.

198625811984 is a deficient number, since it is larger than the sum of its proper divisors (186211698766).

198625811984 is a wasteful number, since it uses less digits than its factorization.

198625811984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12414113257 (or 12414113251 counting only the distinct ones).

The product of its digits is 9953280, while the sum is 62.

The spelling of 198625811984 in words is "one hundred ninety-eight billion, six hundred twenty-five million, eight hundred eleven thousand, nine hundred eighty-four".