12640015264 has 24 divisors (see below), whose sum is σ = 25235527968. Its totient is φ = 6230992320.

The previous prime is 12640015261. The next prime is 12640015343. The reversal of 12640015264 is 46251004621.

It is a happy number.

12640015264 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (12640015261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2779422 + ... + 2783965.

It is an arithmetic number, because the mean of its divisors is an integer number (1051480332).

Almost surely, 2^12640015264 is an apocalyptic number.

It is an amenable number.

12640015264 is a deficient number, since it is larger than the sum of its proper divisors (12595512704).

12640015264 is an equidigital number, since it uses as much as digits as its factorization.

12640015264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5563468 (or 5563460 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 31.

Adding to 12640015264 its reverse (46251004621), we get a palindrome (58891019885).

The spelling of 12640015264 in words is "twelve billion, six hundred forty million, fifteen thousand, two hundred sixty-four".