12602756644 has 9 divisors (see below), whose sum is σ = 22055217051. Its totient is φ = 6301266060.

The previous prime is 12602756641. The next prime is 12602756651. The reversal of 12602756644 is 44665720621.

The square root of 12602756644 is 112262.

It is a perfect power (a square), and thus also a powerful number.

It is a super-2 number, since 2×12602756644² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12602756644.

It is not an unprimeable number, because it can be changed into a prime (12602756641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 196459 + ... + 252589.

Almost surely, 2^12602756644 is an apocalyptic number.

12602756644 is the 112262-nd square number.

It is an amenable number.

12602756644 is a deficient number, since it is larger than the sum of its proper divisors (9452460407).

12602756644 is an frugal number, since it uses more digits than its factorization.

12602756644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112266 (or 56133 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 43.

The spelling of 12602756644 in words is "twelve billion, six hundred two million, seven hundred fifty-six thousand, six hundred forty-four".