14461491581 has 2 divisors, whose sum is σ = 14461491582. Its totient is φ = 14461491580.

The previous prime is 14461491559. The next prime is 14461491647. The reversal of 14461491581 is 18519416441.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8476148356 + 5985343225 = 92066^2 + 77365^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-14461491581 is a prime.

It is a super-2 number, since 2×14461491581² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (14461491481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7230745790 + 7230745791.

It is an arithmetic number, because the mean of its divisors is an integer number (7230745791).

Almost surely, 2^14461491581 is an apocalyptic number.

It is an amenable number.

14461491581 is a deficient number, since it is larger than the sum of its proper divisors (1).

14461491581 is an equidigital number, since it uses as much as digits as its factorization.

14461491581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 138240, while the sum is 44.

The spelling of 14461491581 in words is "fourteen billion, four hundred sixty-one million, four hundred ninety-one thousand, five hundred eighty-one".