199161536 has 28 divisors (see below), whose sum is σ = 451670928. Its totient is φ = 85354752.

The previous prime is 199161517. The next prime is 199161539. The reversal of 199161536 is 635161991.

It is a tau number, because it is divible by the number of its divisors (28).

It is a junction number, because it is equal to n+sod(n) for n = 199161493 and 199161502.

It is not an unprimeable number, because it can be changed into a prime (199161539) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 221831 + ... + 222726.

Almost surely, 2^199161536 is an apocalyptic number.

199161536 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

199161536 is an abundant number, since it is smaller than the sum of its proper divisors (252509392).

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

199161536 is an equidigital number, since it uses as much as digits as its factorization.

199161536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444576 (or 444566 counting only the distinct ones).

The product of its digits is 43740, while the sum is 41.

The square root of 199161536 is about 14112.4603099530. The cubic root of 199161536 is about 583.9851750787.

The spelling of 199161536 in words is "one hundred ninety-nine million, one hundred sixty-one thousand, five hundred thirty-six".