12545553243 has 16 divisors (see below), whose sum is σ = 17008586496. Its totient is φ = 8223744480.

The previous prime is 12545553233. The next prime is 12545553313. The reversal of 12545553243 is 34235554521.

It is not a de Polignac number, because 12545553243 - 2²⁰ = 12544504667 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12545553233) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 496 + ... + 158402.

It is an arithmetic number, because the mean of its divisors is an integer number (1063036656).

Almost surely, 2^12545553243 is an apocalyptic number.

12545553243 is a deficient number, since it is larger than the sum of its proper divisors (4463033253).

12545553243 is a wasteful number, since it uses less digits than its factorization.

12545553243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158354.

The product of its digits is 360000, while the sum is 39.

The spelling of 12545553243 in words is "twelve billion, five hundred forty-five million, five hundred fifty-three thousand, two hundred forty-three".