13648324681 has 2 divisors, whose sum is σ = 13648324682. Its totient is φ = 13648324680.

The previous prime is 13648324667. The next prime is 13648324691. The reversal of 13648324681 is 18642384631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11211421456 + 2436903225 = 105884^2 + 49365^2 .

It is a cyclic number.

It is not a de Polignac number, because 13648324681 - 2⁷ = 13648324553 is a prime.

It is a super-2 number, since 2×13648324681² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (13648324631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6824162340 + 6824162341.

It is an arithmetic number, because the mean of its divisors is an integer number (6824162341).

Almost surely, 2^13648324681 is an apocalyptic number.

It is an amenable number.

13648324681 is a deficient number, since it is larger than the sum of its proper divisors (1).

13648324681 is an equidigital number, since it uses as much as digits as its factorization.

13648324681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 663552, while the sum is 46.

The spelling of 13648324681 in words is "thirteen billion, six hundred forty-eight million, three hundred twenty-four thousand, six hundred eighty-one".