12642344452 has 12 divisors (see below), whose sum is σ = 22126287820. Its totient is φ = 6320547936.

The previous prime is 12642344441. The next prime is 12642344461. The reversal of 12642344452 is 25444324621.

It can be written as a sum of positive squares in 2 ways, for example, as 7333181956 + 5309162496 = 85634^2 + 72864^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 108927 + ... + 192742.

Almost surely, 2^12642344452 is an apocalyptic number.

It is an amenable number.

12642344452 is a deficient number, since it is larger than the sum of its proper divisors (9483943368).

12642344452 is a wasteful number, since it uses less digits than its factorization.

12642344452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312150 (or 312148 counting only the distinct ones).

The product of its digits is 184320, while the sum is 37.

The spelling of 12642344452 in words is "twelve billion, six hundred forty-two million, three hundred forty-four thousand, four hundred fifty-two".