199478674212 has 24 divisors (see below), whose sum is σ = 465514828800. Its totient is φ = 66483664416.

The previous prime is 199478674163. The next prime is 199478674313. The reversal of 199478674212 is 212476874991.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1063012 + ... + 1236507.

It is an arithmetic number, because the mean of its divisors is an integer number (19396451200).

Almost surely, 2^199478674212 is an apocalyptic number.

199478674212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

199478674212 is an abundant number, since it is smaller than the sum of its proper divisors (266036154588).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

199478674212 is a wasteful number, since it uses less digits than its factorization.

199478674212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2306755 (or 2306753 counting only the distinct ones).

The product of its digits is 12192768, while the sum is 60.

The spelling of 199478674212 in words is "one hundred ninety-nine billion, four hundred seventy-eight million, six hundred seventy-four thousand, two hundred twelve".