199318973937 has 8 divisors (see below), whose sum is σ = 268744684320. Its totient is φ = 131386289760.

The previous prime is 199318973911. The next prime is 199318973939. The reversal of 199318973937 is 739379813991.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 199318973937 - 2⁶ = 199318973873 is a prime.

It is not an unprimeable number, because it can be changed into a prime (199318973939) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 373256239 + ... + 373256772.

It is an arithmetic number, because the mean of its divisors is an integer number (33593085540).

Almost surely, 2^199318973937 is an apocalyptic number.

It is an amenable number.

199318973937 is a deficient number, since it is larger than the sum of its proper divisors (69425710383).

199318973937 is an equidigital number, since it uses as much as digits as its factorization.

199318973937 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 746513103.

The product of its digits is 69441624, while the sum is 69.

The spelling of 199318973937 in words is "one hundred ninety-nine billion, three hundred eighteen million, nine hundred seventy-three thousand, nine hundred thirty-seven".