13481756329 has 2 divisors, whose sum is σ = 13481756330. Its totient is φ = 13481756328.

The previous prime is 13481756311. The next prime is 13481756359. The reversal of 13481756329 is 92365718431.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7009875625 + 6471880704 = 83725^2 + 80448^2 .

It is a cyclic number.

It is not a de Polignac number, because 13481756329 - 2⁹ = 13481755817 is a prime.

It is not a weakly prime, because it can be changed into another prime (13481756359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6740878164 + 6740878165.

It is an arithmetic number, because the mean of its divisors is an integer number (6740878165).

Almost surely, 2^13481756329 is an apocalyptic number.

It is an amenable number.

13481756329 is a deficient number, since it is larger than the sum of its proper divisors (1).

13481756329 is an equidigital number, since it uses as much as digits as its factorization.

13481756329 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1088640, while the sum is 49.

The spelling of 13481756329 in words is "thirteen billion, four hundred eighty-one million, seven hundred fifty-six thousand, three hundred twenty-nine".