199539765845631 has 12 divisors (see below), whose sum is σ = 288236875048408. Its totient is φ = 133020617259024.

The previous prime is 199539765845621. The next prime is 199539765845657. The reversal of 199539765845631 is 136548567935991.

199539765845631 is a `hidden beast` number, since 1 + 9 + 9 + 539 + 7 + 6 + 5 + 8 + 45 + 6 + 31 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-199539765845631 is a prime.

It is a super-2 number, since 2×199539765845631² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199539765845621) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 490894285 + ... + 491300598.

Almost surely, 2^{199539765845631} is an apocalyptic number.

199539765845631 is a deficient number, since it is larger than the sum of its proper divisors (88697109202777).

199539765845631 is a wasteful number, since it uses less digits than its factorization.

199539765845631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 982217462 (or 982217459 counting only the distinct ones).

The product of its digits is 6613488000, while the sum is 81.

The spelling of 199539765845631 in words is "one hundred ninety-nine trillion, five hundred thirty-nine billion, seven hundred sixty-five million, eight hundred forty-five thousand, six hundred thirty-one".