13039748681 has 4 divisors (see below), whose sum is σ = 13093855764. Its totient is φ = 12985641600.

The previous prime is 13039748677. The next prime is 13039748713. The reversal of 13039748681 is 18684793031.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18684793031 = 118529 ⋅157639.

It can be written as a sum of positive squares in 2 ways, for example, as 12079988281 + 959760400 = 109909^2 + 30980^2 .

It is a cyclic number.

It is not a de Polignac number, because 13039748681 - 2² = 13039748677 is a prime.

It is a super-2 number, since 2×13039748681² (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 (13039748671) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27053180 + ... + 27053661.

It is an arithmetic number, because the mean of its divisors is an integer number (3273463941).

Almost surely, 2^13039748681 is an apocalyptic number.

It is an amenable number.

13039748681 is a deficient number, since it is larger than the sum of its proper divisors (54107083).

13039748681 is an equidigital number, since it uses as much as digits as its factorization.

13039748681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54107082.

The product of its (nonzero) digits is 870912, while the sum is 50.

The spelling of 13039748681 in words is "thirteen billion, thirty-nine million, seven hundred forty-eight thousand, six hundred eighty-one".