13451440081 has 2 divisors, whose sum is σ = 13451440082. Its totient is φ = 13451440080.

The previous prime is 13451440061. The next prime is 13451440157. The reversal of 13451440081 is 18004415431.

13451440081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11424189456 + 2027250625 = 106884^2 + 45025^2 .

It is a cyclic number.

It is not a de Polignac number, because 13451440081 - 2²⁷ = 13317222353 is a prime.

It is a super-2 number, since 2×13451440081² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (13451440001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6725720040 + 6725720041.

It is an arithmetic number, because the mean of its divisors is an integer number (6725720041).

Almost surely, 2^13451440081 is an apocalyptic number.

It is an amenable number.

13451440081 is a deficient number, since it is larger than the sum of its proper divisors (1).

13451440081 is an equidigital number, since it uses as much as digits as its factorization.

13451440081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7680, while the sum is 31.

The spelling of 13451440081 in words is "thirteen billion, four hundred fifty-one million, four hundred forty thousand, eighty-one".