199142492185 has 64 divisors (see below), whose sum is σ = 298463477760. Its totient is φ = 124192051200.

The previous prime is 199142492177. The next prime is 199142492299. The reversal of 199142492185 is 581294241991.

It is not a de Polignac number, because 199142492185 - 2³ = 199142492177 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 38227861 + ... + 38233069.

It is an arithmetic number, because the mean of its divisors is an integer number (4663491840).

Almost surely, 2^199142492185 is an apocalyptic number.

It is an amenable number.

199142492185 is a deficient number, since it is larger than the sum of its proper divisors (99320985575).

199142492185 is a wasteful number, since it uses less digits than its factorization.

199142492185 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6458.

The product of its digits is 1866240, while the sum is 55.

The spelling of 199142492185 in words is "one hundred ninety-nine billion, one hundred forty-two million, four hundred ninety-two thousand, one hundred eighty-five".