199566144 has 42 divisors (see below), whose sum is σ = 572021970. Its totient is φ = 66521856.

The previous prime is 199566137. The next prime is 199566163. The reversal of 199566144 is 441665991.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 181926144 + 17640000 = 13488^2 + 4200^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 199566144.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 172659 + ... + 173810.

Almost surely, 2^199566144 is an apocalyptic number.

It is an amenable number.

199566144 is an abundant number, since it is smaller than the sum of its proper divisors (372455826).

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

199566144 is a wasteful number, since it uses less digits than its factorization.

199566144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 346487 (or 346474 counting only the distinct ones).

The product of its digits is 233280, while the sum is 45.

The square root of 199566144 is about 14126.7881699982. The cubic root of 199566144 is about 584.3803739542.

The spelling of 199566144 in words is "one hundred ninety-nine million, five hundred sixty-six thousand, one hundred forty-four".