199044251613 has 32 divisors (see below), whose sum is σ = 314505400320. Its totient is φ = 123978862080.

The previous prime is 199044251599. The next prime is 199044251621. The reversal of 199044251613 is 316152440991.

199044251613 is a `hidden beast` number, since 1 + 9 + 9 + 0 + 4 + 4 + 25 + 1 + 613 = 666.

It is not a de Polignac number, because 199044251613 - 2¹⁰ = 199044250589 is a prime.

It is a super-2 number, since 2×199044251613² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199044251663) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1519773 + ... + 1645538.

It is an arithmetic number, because the mean of its divisors is an integer number (9828293760).

Almost surely, 2^199044251613 is an apocalyptic number.

It is an amenable number.

199044251613 is a deficient number, since it is larger than the sum of its proper divisors (115461148707).

199044251613 is a wasteful number, since it uses less digits than its factorization.

199044251613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3165474 (or 3165468 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 45.

The spelling of 199044251613 in words is "one hundred ninety-nine billion, forty-four million, two hundred fifty-one thousand, six hundred thirteen".