13278183361 has 9 divisors (see below), whose sum is σ = 13390549731. Its totient is φ = 13166754984.

The previous prime is 13278183313. The next prime is 13278183487. The reversal of 13278183361 is 16338187231.

The square root of 13278183361 is 115231.

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., 7644179761 + 5634003600 = 87431^2 + 75060^2 .

It is not a de Polignac number, because 13278183361 - 2²¹ = 13276086209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13278183301) 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, 16016695 + ... + 16017523.

It is an arithmetic number, because the mean of its divisors is an integer number (1487838859).

Almost surely, 2^13278183361 is an apocalyptic number.

13278183361 is the 115231-st square number.

13278183361 is the 57616-th centered octagonal number.

It is an amenable number.

13278183361 is a deficient number, since it is larger than the sum of its proper divisors (112366370).

13278183361 is an frugal number, since it uses more digits than its factorization.

13278183361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1936 (or 968 counting only the distinct ones).

The product of its digits is 145152, while the sum is 43.

The spelling of 13278183361 in words is "thirteen billion, two hundred seventy-eight million, one hundred eighty-three thousand, three hundred sixty-one".