285738442024561 has 16 divisors (see below), whose sum is σ = 303582353235840. Its totient is φ = 268361988174720.

The previous prime is 285738442024523. The next prime is 285738442024571. The reversal of 285738442024561 is 165420244837582.

It is a cyclic number.

It is not a de Polignac number, because 285738442024561 - 2²³ = 285738433635953 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (61).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 285738442024561.

It is not an unprimeable number, because it can be changed into a prime (285738442024571) 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 15 ways as a sum of consecutive naturals, for example, 178166955 + ... + 179763568.

It is an arithmetic number, because the mean of its divisors is an integer number (18973897077240).

Almost surely, 2^{285738442024561} is an apocalyptic number.

It is an amenable number.

285738442024561 is a deficient number, since it is larger than the sum of its proper divisors (17843911211279).

285738442024561 is a wasteful number, since it uses less digits than its factorization.

285738442024561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 357931176.

The product of its (nonzero) digits is 103219200, while the sum is 61.

The spelling of 285738442024561 in words is "two hundred eighty-five trillion, seven hundred thirty-eight billion, four hundred forty-two million, twenty-four thousand, five hundred sixty-one".