7245143645581 has 2 divisors, whose sum is σ = 7245143645582. Its totient is φ = 7245143645580.

The previous prime is 7245143645561. The next prime is 7245143645591. The reversal of 7245143645581 is 1855463415427.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7194685008681 + 50458636900 = 2682291^2 + 224630^2 .

It is a cyclic number.

It is not a de Polignac number, because 7245143645581 - 2¹⁷ = 7245143514509 is a prime.

It is a super-2 number, since 2×7245143645581² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7245143645521) 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, 3622571822790 + 3622571822791.

It is an arithmetic number, because the mean of its divisors is an integer number (3622571822791).

Almost surely, 2^{7245143645581} is an apocalyptic number.

It is an amenable number.

7245143645581 is a deficient number, since it is larger than the sum of its proper divisors (1).

7245143645581 is an equidigital number, since it uses as much as digits as its factorization.

7245143645581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16128000, while the sum is 55.

The spelling of 7245143645581 in words is "seven trillion, two hundred forty-five billion, one hundred forty-three million, six hundred forty-five thousand, five hundred eighty-one".