199439418522 has 16 divisors (see below), whose sum is σ = 399370682592. Its totient is φ = 66397831920.

The previous prime is 199439418509. The next prime is 199439418539. The reversal of 199439418522 is 225814934991.

It is a happy 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 in 7 ways as a sum of consecutive naturals, for example, 20488293 + ... + 20498024.

It is an arithmetic number, because the mean of its divisors is an integer number (24960667662).

Almost surely, 2^199439418522 is an apocalyptic number.

199439418522 is an abundant number, since it is smaller than the sum of its proper divisors (199931264070).

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

199439418522 is a wasteful number, since it uses less digits than its factorization.

199439418522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40987133.

The product of its digits is 5598720, while the sum is 57.

The spelling of 199439418522 in words is "one hundred ninety-nine billion, four hundred thirty-nine million, four hundred eighteen thousand, five hundred twenty-two".