198831291570025 has 27 divisors (see below), whose sum is σ = 260211878838981. Its totient is φ = 150692174146080.

The previous prime is 198831291569957. The next prime is 198831291570073. The reversal of 198831291570025 is 520075192138891.

It is a happy number.

The square root of 198831291570025 is 14100755.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 47294600689449 + 151536690880576 = 6877107^2 + 12310024^2 .

It is a de Polignac number, because none of the positive numbers 2^k-198831291570025 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 1339497511 + ... + 1339645939.

Almost surely, 2^{198831291570025} is an apocalyptic number.

198831291570025 is the 14100755-th square number.

198831291570025 is the 7050378-th centered octagonal number.

It is an amenable number.

198831291570025 is a deficient number, since it is larger than the sum of its proper divisors (61380587268956).

198831291570025 is an frugal number, since it uses more digits than its factorization.

198831291570025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296906 (or 148453 counting only the distinct ones).

The product of its (nonzero) digits is 10886400, while the sum is 61.

The spelling of 198831291570025 in words is "one hundred ninety-eight trillion, eight hundred thirty-one billion, two hundred ninety-one million, five hundred seventy thousand, twenty-five".