129999731564543 has 2 divisors, whose sum is σ = 129999731564544. Its totient is φ = 129999731564542.

The previous prime is 129999731564509. The next prime is 129999731564629. The reversal of 129999731564543 is 345465137999921.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 129999731564543 - 2²² = 129999727370239 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129999731564743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64999865782271 + 64999865782272.

It is an arithmetic number, because the mean of its divisors is an integer number (64999865782272).

Almost surely, 2^{129999731564543} is an apocalyptic number.

129999731564543 is a deficient number, since it is larger than the sum of its proper divisors (1).

129999731564543 is an equidigital number, since it uses as much as digits as its factorization.

129999731564543 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1984046400, while the sum is 77.

The spelling of 129999731564543 in words is "one hundred twenty-nine trillion, nine hundred ninety-nine billion, seven hundred thirty-one million, five hundred sixty-four thousand, five hundred forty-three".