145454454581 has 2 divisors, whose sum is σ = 145454454582. Its totient is φ = 145454454580.

The previous prime is 145454454559. The next prime is 145454454599. The reversal of 145454454581 is 185454454541.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 145397316100 + 57138481 = 381310^2 + 7559^2 .

It is a cyclic number.

It is not a de Polignac number, because 145454454581 - 2¹⁸ = 145454192437 is a prime.

It is a super-2 number, since 2×145454454581² (a number of 23 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 (145454451581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72727227290 + 72727227291.

It is an arithmetic number, because the mean of its divisors is an integer number (72727227291).

Almost surely, 2^145454454581 is an apocalyptic number.

It is an amenable number.

145454454581 is a deficient number, since it is larger than the sum of its proper divisors (1).

145454454581 is an equidigital number, since it uses as much as digits as its factorization.

145454454581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5120000, while the sum is 50.

The spelling of 145454454581 in words is "one hundred forty-five billion, four hundred fifty-four million, four hundred fifty-four thousand, five hundred eighty-one".