13797321444 has 27 divisors (see below), whose sum is σ = 34878344137. Its totient is φ = 4598872224.

The previous prime is 13797321437. The next prime is 13797321467. The reversal of 13797321444 is 44412379731.

The square root of 13797321444 is 117462.

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

13797321444 is a `hidden beast` number, since 137 + 9 + 73 + 2 + 1 + 444 = 666.

13797321444 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 13085072100 + 712249344 = 114390^2 + 26688^2 .

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 13797321444.

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 in 8 ways as a sum of consecutive naturals, for example, 694984 + ... + 714560.

Almost surely, 2^13797321444 is an apocalyptic number.

13797321444 is the 117462-nd square number.

It is an amenable number.

13797321444 is an abundant number, since it is smaller than the sum of its proper divisors (21081022693).

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

13797321444 is an frugal number, since it uses more digits than its factorization.

13797321444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39164 (or 19582 counting only the distinct ones).

The product of its digits is 508032, while the sum is 45.

It can be divided in two parts, 13797 and 321444, that added together give a square (335241 = 579²).

The spelling of 13797321444 in words is "thirteen billion, seven hundred ninety-seven million, three hundred twenty-one thousand, four hundred forty-four".