12905359909543 has 4 divisors (see below), whose sum is σ = 12906965261520. Its totient is φ = 12903754557568.

The previous prime is 12905359909513. The next prime is 12905359909571. The reversal of 12905359909543 is 34590995350921.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12905359909543 - 2⁵ = 12905359909511 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12905359909513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 802663930 + ... + 802680007.

It is an arithmetic number, because the mean of its divisors is an integer number (3226741315380).

Almost surely, 2^{12905359909543} is an apocalyptic number.

12905359909543 is a deficient number, since it is larger than the sum of its proper divisors (1605351977).

12905359909543 is an equidigital number, since it uses as much as digits as its factorization.

12905359909543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1605351976.

The product of its (nonzero) digits is 59049000, while the sum is 64.

The spelling of 12905359909543 in words is "twelve trillion, nine hundred five billion, three hundred fifty-nine million, nine hundred nine thousand, five hundred forty-three".