198734525565 has 8 divisors (see below), whose sum is σ = 317975240928. Its totient is φ = 105991746960.

The previous prime is 198734525513. The next prime is 198734525569. The reversal of 198734525565 is 565525437891.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 198734525565 - 2³⁰ = 197660783741 is a prime.

It is a Smith number, since the sum of its digits (60) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 198734525499 and 198734525508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198734525569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6624484171 + ... + 6624484200.

It is an arithmetic number, because the mean of its divisors is an integer number (39746905116).

Almost surely, 2^198734525565 is an apocalyptic number.

198734525565 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

198734525565 is a deficient number, since it is larger than the sum of its proper divisors (119240715363).

198734525565 is a wasteful number, since it uses less digits than its factorization.

198734525565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13248968379.

The product of its digits is 45360000, while the sum is 60.

The spelling of 198734525565 in words is "one hundred ninety-eight billion, seven hundred thirty-four million, five hundred twenty-five thousand, five hundred sixty-five".