14449999981 has 2 divisors, whose sum is σ = 14449999982. Its totient is φ = 14449999980.

The previous prime is 14449999957. The next prime is 14449999997. The reversal of 14449999981 is 18999994441.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11344167081 + 3105832900 = 106509^2 + 55730^2 .

It is a cyclic number.

It is not a de Polignac number, because 14449999981 - 2¹⁹ = 14449475693 is a prime.

It is a super-2 number, since 2×14449999981² (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 (14449999901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7224999990 + 7224999991.

It is an arithmetic number, because the mean of its divisors is an integer number (7224999991).

Almost surely, 2^14449999981 is an apocalyptic number.

It is an amenable number.

14449999981 is a deficient number, since it is larger than the sum of its proper divisors (1).

14449999981 is an equidigital number, since it uses as much as digits as its factorization.

14449999981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30233088, while the sum is 67.

The spelling of 14449999981 in words is "fourteen billion, four hundred forty-nine million, nine hundred ninety-nine thousand, nine hundred eighty-one".