198645534 has 40 divisors (see below), whose sum is σ = 460472760. Its totient is φ = 63930384.

The previous prime is 198645523. The next prime is 198645571. The reversal of 198645534 is 435546891.

198645534 is a `hidden beast` number, since 1 + 98 + 6 + 4 + 553 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 198645534.

It is a congruent number.

It is an unprimeable number.

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 19 ways as a sum of consecutive naturals, for example, 16444 + ... + 25839.

It is an arithmetic number, because the mean of its divisors is an integer number (11511819).

Almost surely, 2^198645534 is an apocalyptic number.

198645534 is an abundant number, since it is smaller than the sum of its proper divisors (261827226).

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

198645534 is a wasteful number, since it uses less digits than its factorization.

198645534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42326 (or 42317 counting only the distinct ones).

The product of its digits is 518400, while the sum is 45.

The square root of 198645534 is about 14094.1666656812. The cubic root of 198645534 is about 583.4803953207.

The spelling of 198645534 in words is "one hundred ninety-eight million, six hundred forty-five thousand, five hundred thirty-four".