198772564 has 12 divisors (see below), whose sum is σ = 348040000. Its totient is φ = 99332568.

The previous prime is 198772559. The next prime is 198772577. The reversal of 198772564 is 465277891.

198772564 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4434 + ... + 20425.

Almost surely, 2^198772564 is an apocalyptic number.

It is an amenable number.

198772564 is a deficient number, since it is larger than the sum of its proper divisors (149267436).

198772564 is a wasteful number, since it uses less digits than its factorization.

198772564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26862 (or 26860 counting only the distinct ones).

The product of its digits is 846720, while the sum is 49.

The square root of 198772564 is about 14098.6724197706. The cubic root of 198772564 is about 583.6047436501.

The spelling of 198772564 in words is "one hundred ninety-eight million, seven hundred seventy-two thousand, five hundred sixty-four".