13220944144638 has 32 divisors (see below), whose sum is σ = 26484583582080. Its totient is φ = 4399866857760.

The previous prime is 13220944144621. The next prime is 13220944144679. The reversal of 13220944144638 is 83644144902231.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40046881 + ... + 40375667.

It is an arithmetic number, because the mean of its divisors is an integer number (827643236940).

Almost surely, 2^{13220944144638} is an apocalyptic number.

13220944144638 is an abundant number, since it is smaller than the sum of its proper divisors (13263639437442).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13220944144638 is a wasteful number, since it uses less digits than its factorization.

13220944144638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339592.

The product of its (nonzero) digits is 3981312, while the sum is 51.

The spelling of 13220944144638 in words is "thirteen trillion, two hundred twenty billion, nine hundred forty-four million, one hundred forty-four thousand, six hundred thirty-eight".