198736815272 has 8 divisors (see below), whose sum is σ = 372631528650. Its totient is φ = 99368407632.

The previous prime is 198736815227. The next prime is 198736815281. The reversal of 198736815272 is 272518637891.

It can be written as a sum of positive squares in only one way, i.e., 144267790276 + 54469024996 = 379826^2 + 233386^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12421050947 + ... + 12421050962.

Almost surely, 2^198736815272 is an apocalyptic number.

It is an amenable number.

198736815272 is a deficient number, since it is larger than the sum of its proper divisors (173894713378).

198736815272 is a wasteful number, since it uses less digits than its factorization.

198736815272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24842101915 (or 24842101911 counting only the distinct ones).

The product of its digits is 10160640, while the sum is 59.

The spelling of 198736815272 in words is "one hundred ninety-eight billion, seven hundred thirty-six million, eight hundred fifteen thousand, two hundred seventy-two".