13454423999981 has 2 divisors, whose sum is σ = 13454423999982. Its totient is φ = 13454423999980.

The previous prime is 13454423999963. The next prime is 13454424000001. The reversal of 13454423999981 is 18999932445431.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7269677782756 + 6184746217225 = 2696234^2 + 2486915^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13454423999981 is a prime.

It is a super-2 number, since 2×13454423999981² (a number of 27 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13454423999281) 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, 6727211999990 + 6727211999991.

It is an arithmetic number, because the mean of its divisors is an integer number (6727211999991).

Almost surely, 2^{13454423999981} is an apocalyptic number.

It is an amenable number.

13454423999981 is a deficient number, since it is larger than the sum of its proper divisors (1).

13454423999981 is an equidigital number, since it uses as much as digits as its factorization.

13454423999981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 302330880, while the sum is 71.

The spelling of 13454423999981 in words is "thirteen trillion, four hundred fifty-four billion, four hundred twenty-three million, nine hundred ninety-nine thousand, nine hundred eighty-one".