285581405833541 has 2 divisors, whose sum is σ = 285581405833542. Its totient is φ = 285581405833540.

The previous prime is 285581405833531. The next prime is 285581405833553. The reversal of 285581405833541 is 145338504185582.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 254606381832100 + 30975024001441 = 15956390^2 + 5565521^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-285581405833541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (285581405833511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142790702916770 + 142790702916771.

It is an arithmetic number, because the mean of its divisors is an integer number (142790702916771).

Almost surely, 2^{285581405833541} is an apocalyptic number.

It is an amenable number.

285581405833541 is a deficient number, since it is larger than the sum of its proper divisors (1).

285581405833541 is an equidigital number, since it uses as much as digits as its factorization.

285581405833541 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 92160000, while the sum is 62.

The spelling of 285581405833541 in words is "two hundred eighty-five trillion, five hundred eighty-one billion, four hundred five million, eight hundred thirty-three thousand, five hundred forty-one".