199641137968 has 40 divisors (see below), whose sum is σ = 396346569696. Its totient is φ = 97359475200.

The previous prime is 199641137953. The next prime is 199641138007. The reversal of 199641137968 is 869731146991.

It is a super-2 number, since 2×199641137968² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (64) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 2494738 + ... + 2573518.

Almost surely, 2^199641137968 is an apocalyptic number.

It is an amenable number.

199641137968 is a deficient number, since it is larger than the sum of its proper divisors (196705431728).

199641137968 is a wasteful number, since it uses less digits than its factorization.

199641137968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82693 (or 82687 counting only the distinct ones).

The product of its digits is 17635968, while the sum is 64.

The spelling of 199641137968 in words is "one hundred ninety-nine billion, six hundred forty-one million, one hundred thirty-seven thousand, nine hundred sixty-eight".