12641213344 has 12 divisors (see below), whose sum is σ = 24887388834. Its totient is φ = 6320606656.

The previous prime is 12641213317. The next prime is 12641213369. The reversal of 12641213344 is 44331214621.

It can be written as a sum of positive squares in only one way, i.e., 11590675600 + 1050537744 = 107660^2 + 32412^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197518927 + ... + 197518990.

Almost surely, 2^12641213344 is an apocalyptic number.

It is an amenable number.

12641213344 is a deficient number, since it is larger than the sum of its proper divisors (12246175490).

12641213344 is an equidigital number, since it uses as much as digits as its factorization.

12641213344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395037927 (or 395037919 counting only the distinct ones).

The product of its digits is 13824, while the sum is 31.

Adding to 12641213344 its reverse (44331214621), we get a palindrome (56972427965).

The spelling of 12641213344 in words is "twelve billion, six hundred forty-one million, two hundred thirteen thousand, three hundred forty-four".