12782748543 has 4 divisors (see below), whose sum is σ = 17043664728. Its totient is φ = 8521832360.

The previous prime is 12782748533. The next prime is 12782748581. The reversal of 12782748543 is 34584728721.

It is a happy number.

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 12782748543 - 2²⁵ = 12749194111 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12782748533) 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, 2130458088 + ... + 2130458093.

It is an arithmetic number, because the mean of its divisors is an integer number (4260916182).

Almost surely, 2^12782748543 is an apocalyptic number.

12782748543 is a deficient number, since it is larger than the sum of its proper divisors (4260916185).

12782748543 is an equidigital number, since it uses as much as digits as its factorization.

12782748543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4260916184.

The product of its digits is 3010560, while the sum is 51.

The spelling of 12782748543 in words is "twelve billion, seven hundred eighty-two million, seven hundred forty-eight thousand, five hundred forty-three".