199556361 has 12 divisors (see below), whose sum is σ = 290450160. Its totient is φ = 132021240.

The previous prime is 199556359. The next prime is 199556369. The reversal of 199556361 is 163655991.

199556361 is a `hidden beast` number, since 1 + 9 + 9 + 5 + 5 + 636 + 1 = 666.

It is not a de Polignac number, because 199556361 - 2¹ = 199556359 is a prime.

It is not an unprimeable number, because it can be changed into a prime (199556369) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 83451 + ... + 85808.

It is an arithmetic number, because the mean of its divisors is an integer number (24204180).

Almost surely, 2^199556361 is an apocalyptic number.

It is an amenable number.

199556361 is a deficient number, since it is larger than the sum of its proper divisors (90893799).

199556361 is a wasteful number, since it uses less digits than its factorization.

199556361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169396 (or 169393 counting only the distinct ones).

The product of its digits is 218700, while the sum is 45.

The square root of 199556361 is about 14126.4419087044. The cubic root of 199556361 is about 584.3708247617.

The spelling of 199556361 in words is "one hundred ninety-nine million, five hundred fifty-six thousand, three hundred sixty-one".