13228469681 has 8 divisors (see below), whose sum is σ = 15426787200. Its totient is φ = 11338688004.

The previous prime is 13228469671. The next prime is 13228469717. The reversal of 13228469681 is 18696482231.

It is a de Polignac number, because none of the positive numbers 2^k-13228469681 is a prime.

It is a super-2 number, since 2×13228469681² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13228469621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19283141 + ... + 19283826.

It is an arithmetic number, because the mean of its divisors is an integer number (1928348400).

Almost surely, 2^13228469681 is an apocalyptic number.

It is an amenable number.

13228469681 is a deficient number, since it is larger than the sum of its proper divisors (2198317519).

13228469681 is an frugal number, since it uses more digits than its factorization.

13228469681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38566988 (or 38566974 counting only the distinct ones).

The product of its digits is 995328, while the sum is 50.

The spelling of 13228469681 in words is "thirteen billion, two hundred twenty-eight million, four hundred sixty-nine thousand, six hundred eighty-one".