199775794982431 has 2 divisors, whose sum is σ = 199775794982432. Its totient is φ = 199775794982430.

The previous prime is 199775794982363. The next prime is 199775794982447. The reversal of 199775794982431 is 134289497577991.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 199775794982431 - 2¹⁷ = 199775794851359 is a prime.

It is a super-2 number, since 2×199775794982431² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199775734982431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99887897491215 + 99887897491216.

It is an arithmetic number, because the mean of its divisors is an integer number (99887897491216).

Almost surely, 2^{199775794982431} is an apocalyptic number.

199775794982431 is a deficient number, since it is larger than the sum of its proper divisors (1).

199775794982431 is an equidigital number, since it uses as much as digits as its factorization.

199775794982431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8641624320, while the sum is 85.

The spelling of 199775794982431 in words is "one hundred ninety-nine trillion, seven hundred seventy-five billion, seven hundred ninety-four million, nine hundred eighty-two thousand, four hundred thirty-one".