305445404242261 has 12 divisors (see below), whose sum is σ = 328914475710052. Its totient is φ = 283539972331008.

The previous prime is 305445404242247. The next prime is 305445404242273. The reversal of 305445404242261 is 162242404544503.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 1134161100900 + 304311243141361 = 1064970^2 + 17444519^2 .

It is not a de Polignac number, because 305445404242261 - 2⁹ = 305445404241749 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (305445404242061) 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 in 11 ways as a sum of consecutive naturals, for example, 7239050910 + ... + 7239093103.

Almost surely, 2^{305445404242261} is an apocalyptic number.

It is an amenable number.

305445404242261 is a deficient number, since it is larger than the sum of its proper divisors (23469071467791).

305445404242261 is a wasteful number, since it uses less digits than its factorization.

305445404242261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14478144120 (or 14478144103 counting only the distinct ones).

The product of its (nonzero) digits is 3686400, while the sum is 46.

Adding to 305445404242261 its reverse (162242404544503), we get a palindrome (467687808786764).

The spelling of 305445404242261 in words is "three hundred five trillion, four hundred forty-five billion, four hundred four million, two hundred forty-two thousand, two hundred sixty-one".