7245143645561 has 2 divisors, whose sum is σ = 7245143645562. Its totient is φ = 7245143645560.

The previous prime is 7245143645539. The next prime is 7245143645581. The reversal of 7245143645561 is 1655463415427.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7235212327225 + 9931318336 = 2689835^2 + 99656^2 .

It is a cyclic number.

It is not a de Polignac number, because 7245143645561 - 2²⁶ = 7245076536697 is a prime.

It is not a weakly prime, because it can be changed into another prime (7245143645521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3622571822780 + 3622571822781.

It is an arithmetic number, because the mean of its divisors is an integer number (3622571822781).

Almost surely, 2^{7245143645561} is an apocalyptic number.

It is an amenable number.

7245143645561 is a deficient number, since it is larger than the sum of its proper divisors (1).

7245143645561 is an equidigital number, since it uses as much as digits as its factorization.

7245143645561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12096000, while the sum is 53.

The spelling of 7245143645561 in words is "seven trillion, two hundred forty-five billion, one hundred forty-three million, six hundred forty-five thousand, five hundred sixty-one".