12943639457218 has 16 divisors (see below), whose sum is σ = 19473954546816. Its totient is φ = 6452332760880.

The previous prime is 12943639457213. The next prime is 12943639457249. The reversal of 12943639457218 is 81275493634921.

It is a self number, because there is not a number n which added to its sum of digits gives 12943639457218.

It is not an unprimeable number, because it can be changed into a prime (12943639457213) 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, 614628 + ... + 5124943.

It is an arithmetic number, because the mean of its divisors is an integer number (1217122159176).

Almost surely, 2^{12943639457218} is an apocalyptic number.

12943639457218 is a deficient number, since it is larger than the sum of its proper divisors (6530315089598).

12943639457218 is a wasteful number, since it uses less digits than its factorization.

12943639457218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5742969.

The product of its digits is 78382080, while the sum is 64.

The spelling of 12943639457218 in words is "twelve trillion, nine hundred forty-three billion, six hundred thirty-nine million, four hundred fifty-seven thousand, two hundred eighteen".