12543542256351 has 4 divisors (see below), whose sum is σ = 16724723008472. Its totient is φ = 8362361504232.

The previous prime is 12543542256307. The next prime is 12543542256449. The reversal of 12543542256351 is 15365224534521.

12543542256351 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 12543542256351 - 2¹⁹ = 12543541732063 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12543542256351.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12543542256251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2090590376056 + ... + 2090590376061.

It is an arithmetic number, because the mean of its divisors is an integer number (4181180752118).

Almost surely, 2^{12543542256351} is an apocalyptic number.

12543542256351 is a deficient number, since it is larger than the sum of its proper divisors (4181180752121).

12543542256351 is an equidigital number, since it uses as much as digits as its factorization.

12543542256351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4181180752120.

The product of its digits is 4320000, while the sum is 48.

The spelling of 12543542256351 in words is "twelve trillion, five hundred forty-three billion, five hundred forty-two million, two hundred fifty-six thousand, three hundred fifty-one".