13281256169 has 2 divisors, whose sum is σ = 13281256170. Its totient is φ = 13281256168.

The previous prime is 13281256141. The next prime is 13281256211. The reversal of 13281256169 is 96165218231.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13279566169 + 1690000 = 115237^2 + 1300^2 .

It is a cyclic number.

It is not a de Polignac number, because 13281256169 - 2³² = 8986288873 is a prime.

It is a super-2 number, since 2×13281256169² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (13281256669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6640628084 + 6640628085.

It is an arithmetic number, because the mean of its divisors is an integer number (6640628085).

Almost surely, 2^13281256169 is an apocalyptic number.

It is an amenable number.

13281256169 is a deficient number, since it is larger than the sum of its proper divisors (1).

13281256169 is an equidigital number, since it uses as much as digits as its factorization.

13281256169 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 155520, while the sum is 44.

The spelling of 13281256169 in words is "thirteen billion, two hundred eighty-one million, two hundred fifty-six thousand, one hundred sixty-nine".