13244725642 has 4 divisors (see below), whose sum is σ = 19867088466. Its totient is φ = 6622362820.

The previous prime is 13244725639. The next prime is 13244725657. The reversal of 13244725642 is 24652744231.

13244725642 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in only one way, i.e., 10617035521 + 2627690121 = 103039^2 + 51261^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 13244725595 and 13244725604.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 3311181409 + ... + 3311181412.

Almost surely, 2^13244725642 is an apocalyptic number.

13244725642 is a deficient number, since it is larger than the sum of its proper divisors (6622362824).

13244725642 is an equidigital number, since it uses as much as digits as its factorization.

13244725642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6622362823.

The product of its digits is 322560, while the sum is 40.

The spelling of 13244725642 in words is "thirteen billion, two hundred forty-four million, seven hundred twenty-five thousand, six hundred forty-two".