168198525 has 84 divisors (see below), whose sum is σ = 341540640. Its totient is φ = 81453600.

The previous prime is 168198473. The next prime is 168198539. The reversal of 168198525 is 525891861.

It is a happy number.

It is not a de Polignac number, because 168198525 - 2⁶ = 168198461 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 83 ways as a sum of consecutive naturals, for example, 200056 + ... + 200894.

It is an arithmetic number, because the mean of its divisors is an integer number (4065960).

Almost surely, 2^168198525 is an apocalyptic number.

168198525 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

168198525 is an abundant number, since it is smaller than the sum of its proper divisors (173342115).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

168198525 is an equidigital number, since it uses as much as digits as its factorization.

168198525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 878 (or 858 counting only the distinct ones).

The product of its digits is 172800, while the sum is 45.

The square root of 168198525 is about 12969.1374038523. The cubic root of 168198525 is about 552.0020971092.

The spelling of 168198525 in words is "one hundred sixty-eight million, one hundred ninety-eight thousand, five hundred twenty-five".