12644035763 has 4 divisors (see below), whose sum is σ = 12719748720. Its totient is φ = 12568322808.

The previous prime is 12644035693. The next prime is 12644035777. The reversal of 12644035763 is 36753044621.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12644035763 - 2³² = 8349068467 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12644035763.

It is not an unprimeable number, because it can be changed into a prime (12644035783) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37856228 + ... + 37856561.

It is an arithmetic number, because the mean of its divisors is an integer number (3179937180).

Almost surely, 2^12644035763 is an apocalyptic number.

12644035763 is a deficient number, since it is larger than the sum of its proper divisors (75712957).

12644035763 is an equidigital number, since it uses as much as digits as its factorization.

12644035763 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75712956.

The product of its (nonzero) digits is 362880, while the sum is 41.

The spelling of 12644035763 in words is "twelve billion, six hundred forty-four million, thirty-five thousand, seven hundred sixty-three".