199451117168 has 10 divisors (see below), whose sum is σ = 386436539544. Its totient is φ = 99725558576.

The previous prime is 199451117153. The next prime is 199451117171. The reversal of 199451117168 is 861711154991.

It is a congruent number.

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 as a sum of consecutive naturals, namely, 6232847396 + ... + 6232847427.

Almost surely, 2^199451117168 is an apocalyptic number.

It is an amenable number.

199451117168 is a deficient number, since it is larger than the sum of its proper divisors (186985422376).

199451117168 is a wasteful number, since it uses less digits than its factorization.

199451117168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12465694831 (or 12465694825 counting only the distinct ones).

The product of its digits is 544320, while the sum is 53.

The spelling of 199451117168 in words is "one hundred ninety-nine billion, four hundred fifty-one million, one hundred seventeen thousand, one hundred sixty-eight".