14108591681 has 2 divisors, whose sum is σ = 14108591682. Its totient is φ = 14108591680.

The previous prime is 14108591659. The next prime is 14108591719. The reversal of 14108591681 is 18619580141.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13895694400 + 212897281 = 117880^2 + 14591^2 .

It is a cyclic number.

It is not a de Polignac number, because 14108591681 - 2⁶ = 14108591617 is a prime.

It is a super-2 number, since 2×14108591681² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (14108591281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7054295840 + 7054295841.

It is an arithmetic number, because the mean of its divisors is an integer number (7054295841).

Almost surely, 2^14108591681 is an apocalyptic number.

It is an amenable number.

14108591681 is a deficient number, since it is larger than the sum of its proper divisors (1).

14108591681 is an equidigital number, since it uses as much as digits as its factorization.

14108591681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69120, while the sum is 44.

The spelling of 14108591681 in words is "fourteen billion, one hundred eight million, five hundred ninety-one thousand, six hundred eighty-one".