12644015343 has 16 divisors (see below), whose sum is σ = 16960242816. Its totient is φ = 8378647200.

The previous prime is 12644015339. The next prime is 12644015347. The reversal of 12644015343 is 34351044621.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (12644015339) and next prime (12644015347).

It is not a de Polignac number, because 12644015343 - 2² = 12644015339 is a prime.

It is a super-2 number, since 2×12644015343² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12644015347) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 654168 + ... + 673218.

It is an arithmetic number, because the mean of its divisors is an integer number (1060015176).

Almost surely, 2^12644015343 is an apocalyptic number.

12644015343 is a deficient number, since it is larger than the sum of its proper divisors (4316227473).

12644015343 is a wasteful number, since it uses less digits than its factorization.

12644015343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20374.

The product of its (nonzero) digits is 34560, while the sum is 33.

Adding to 12644015343 its reverse (34351044621), we get a palindrome (46995059964).

The spelling of 12644015343 in words is "twelve billion, six hundred forty-four million, fifteen thousand, three hundred forty-three".