199940849522 has 54 divisors (see below), whose sum is σ = 320296399437. Its totient is φ = 93599693792.

The previous prime is 199940849501. The next prime is 199940849611. The reversal of 199940849522 is 225948049991.

It can be written as a sum of positive squares in 2 ways, for example, as 180404917081 + 19535932441 = 424741^2 + 139771^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=316181.

It is a Duffinian 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 26 ways as a sum of consecutive naturals, for example, 858115118 + ... + 858115350.

Almost surely, 2^199940849522 is an apocalyptic number.

199940849522 is a deficient number, since it is larger than the sum of its proper divisors (120355549915).

199940849522 is an frugal number, since it uses more digits than its factorization.

199940849522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 632 (or 317 counting only the distinct ones).

The product of its (nonzero) digits is 16796160, while the sum is 62.

The spelling of 199940849522 in words is "one hundred ninety-nine billion, nine hundred forty million, eight hundred forty-nine thousand, five hundred twenty-two".