12543216401 has 8 divisors (see below), whose sum is σ = 12837427680. Its totient is φ = 12249119232.

The previous prime is 12543216397. The next prime is 12543216407. The reversal of 12543216401 is 10461234521.

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

It is a cyclic number.

It is not a de Polignac number, because 12543216401 - 2² = 12543216397 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12543216407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 218705 + ... + 270033.

It is an arithmetic number, because the mean of its divisors is an integer number (1604678460).

Almost surely, 2^12543216401 is an apocalyptic number.

It is an amenable number.

12543216401 is a deficient number, since it is larger than the sum of its proper divisors (294211279).

12543216401 is an equidigital number, since it uses as much as digits as its factorization.

12543216401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57055.

The product of its (nonzero) digits is 5760, while the sum is 29.

The spelling of 12543216401 in words is "twelve billion, five hundred forty-three million, two hundred sixteen thousand, four hundred one".