199974168508 has 24 divisors (see below), whose sum is σ = 350616621600. Its totient is φ = 99798067200.

The previous prime is 199974168467. The next prime is 199974168523. The reversal of 199974168508 is 805861479991.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18858408 + ... + 18869008.

It is an arithmetic number, because the mean of its divisors is an integer number (14609025900).

Almost surely, 2^199974168508 is an apocalyptic number.

It is an amenable number.

199974168508 is a deficient number, since it is larger than the sum of its proper divisors (150642453092).

199974168508 is a wasteful number, since it uses less digits than its factorization.

199974168508 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19077 (or 19075 counting only the distinct ones).

The product of its (nonzero) digits is 39191040, while the sum is 67.

The spelling of 199974168508 in words is "one hundred ninety-nine billion, nine hundred seventy-four million, one hundred sixty-eight thousand, five hundred eight".