13326162721 has 9 divisors (see below), whose sum is σ = 13409682483. Its totient is φ = 13243162080.

The previous prime is 13326162709. The next prime is 13326162761. The reversal of 13326162721 is 12726162331.

The square root of 13326162721 is 115439.

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

It can be written as a sum of positive squares in only one way, i.e., 10022212321 + 3303950400 = 100111^2 + 57480^2 .

It is not a de Polignac number, because 13326162721 - 2¹⁹ = 13325638433 is a prime.

It is a super-2 number, since 2×13326162721² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13326162761) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 27820560 + ... + 27821038.

Almost surely, 2^13326162721 is an apocalyptic number.

13326162721 is the 115439-th square number.

13326162721 is the 57720-th centered octagonal number.

It is an amenable number.

13326162721 is a deficient number, since it is larger than the sum of its proper divisors (83519762).

13326162721 is an frugal number, since it uses more digits than its factorization.

13326162721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1440 (or 720 counting only the distinct ones).

The product of its digits is 18144, while the sum is 34.

The spelling of 13326162721 in words is "thirteen billion, three hundred twenty-six million, one hundred sixty-two thousand, seven hundred twenty-one".