13245563638838 has 16 divisors (see below), whose sum is σ = 20291339787264. Its totient is φ = 6481787370600.

The previous prime is 13245563638789. The next prime is 13245563638861. The reversal of 13245563638838 is 83883636554231.

13245563638838 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×13245563638838² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6694613 + ... + 8444463.

It is an arithmetic number, because the mean of its divisors is an integer number (1268208736704).

Almost surely, 2^{13245563638838} is an apocalyptic number.

13245563638838 is a deficient number, since it is larger than the sum of its proper divisors (7045776148426).

13245563638838 is a wasteful number, since it uses less digits than its factorization.

13245563638838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1830427.

The product of its digits is 298598400, while the sum is 65.

The spelling of 13245563638838 in words is "thirteen trillion, two hundred forty-five billion, five hundred sixty-three million, six hundred thirty-eight thousand, eight hundred thirty-eight".