199999731224757 has 16 divisors (see below), whose sum is σ = 266911888194432. Its totient is φ = 133210370329920.

The previous prime is 199999731224749. The next prime is 199999731224879. The reversal of 199999731224757 is 757422137999991.

It is not a de Polignac number, because 199999731224757 - 2³ = 199999731224749 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 199999731224757.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199999731224717) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 133418632 + ... + 134909342.

It is an arithmetic number, because the mean of its divisors is an integer number (16681993012152).

Almost surely, 2^{199999731224757} is an apocalyptic number.

It is an amenable number.

199999731224757 is a deficient number, since it is larger than the sum of its proper divisors (66912156969675).

199999731224757 is a wasteful number, since it uses less digits than its factorization.

199999731224757 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1531868.

The product of its digits is 4860913680, while the sum is 84.

The spelling of 199999731224757 in words is "one hundred ninety-nine trillion, nine hundred ninety-nine billion, seven hundred thirty-one million, two hundred twenty-four thousand, seven hundred fifty-seven".