1339711336681 has 9 divisors (see below), whose sum is σ = 1351804081719. Its totient is φ = 1327725848736.

The previous prime is 1339711336673. The next prime is 1339711336699. The reversal of 1339711336681 is 1866331179331.

The square root of 1339711336681 is 1157459.

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., 23606786025 + 1316104550656 = 153645^2 + 1147216^2 .

It is not a de Polignac number, because 1339711336681 - 2³ = 1339711336673 is a prime.

It is a super-2 number, since 2×1339711336681² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1339711336651) 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, 130787746 + ... + 130797988.

Almost surely, 2^{1339711336681} is an apocalyptic number.

1339711336681 is the 1157459-th square number.

1339711336681 is the 578730-th centered octagonal number.

It is an amenable number.

1339711336681 is a deficient number, since it is larger than the sum of its proper divisors (12092745038).

1339711336681 is an frugal number, since it uses more digits than its factorization.

1339711336681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20712 (or 10356 counting only the distinct ones).

The product of its digits is 1469664, while the sum is 52.

The spelling of 1339711336681 in words is "one trillion, three hundred thirty-nine billion, seven hundred eleven million, three hundred thirty-six thousand, six hundred eighty-one".