12543216526 has 8 divisors (see below), whose sum is σ = 18817802640. Its totient is φ = 6270615648.

The previous prime is 12543216493. The next prime is 12543216533. The reversal of 12543216526 is 62561234521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 480411 + ... + 505846.

It is an arithmetic number, because the mean of its divisors is an integer number (2352225330).

Almost surely, 2^12543216526 is an apocalyptic number.

12543216526 is a deficient number, since it is larger than the sum of its proper divisors (6274586114).

12543216526 is an equidigital number, since it uses as much as digits as its factorization.

12543216526 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 992618.

The product of its digits is 86400, while the sum is 37.

The spelling of 12543216526 in words is "twelve billion, five hundred forty-three million, two hundred sixteen thousand, five hundred twenty-six".