199455568 has 20 divisors (see below), whose sum is σ = 416172148. Its totient is φ = 92056320.

The previous prime is 199455499. The next prime is 199455569. The reversal of 199455568 is 865554991.

It can be written as a sum of positive squares in 2 ways, for example, as 23309584 + 176145984 = 4828^2 + 13272^2 .

It is a Harshad number since it is a multiple of its sum of digits (52).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199455569) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 479253 + ... + 479668.

Almost surely, 2^199455568 is an apocalyptic number.

It is an amenable number.

199455568 is an abundant number, since it is smaller than the sum of its proper divisors (216716580).

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

199455568 is a wasteful number, since it uses less digits than its factorization.

199455568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 958942 (or 958936 counting only the distinct ones).

The product of its digits is 1944000, while the sum is 52.

The square root of 199455568 is about 14122.8739284892. The cubic root of 199455568 is about 584.2724224730.

The spelling of 199455568 in words is "one hundred ninety-nine million, four hundred fifty-five thousand, five hundred sixty-eight".