285566694426 has 144 divisors (see below), whose sum is σ = 718762131360. Its totient is φ = 84836082240.

The previous prime is 285566694419. The next prime is 285566694463. The reversal of 285566694426 is 624496665582.

It is a happy number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 2321941 + ... + 2441831.

It is an arithmetic number, because the mean of its divisors is an integer number (4991403690).

Almost surely, 2^285566694426 is an apocalyptic number.

285566694426 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 285566694426, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (359381065680).

285566694426 is an abundant number, since it is smaller than the sum of its proper divisors (433195436934).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

285566694426 is a wasteful number, since it uses less digits than its factorization.

285566694426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119963 (or 119938 counting only the distinct ones).

The product of its digits is 149299200, while the sum is 63.

The spelling of 285566694426 in words is "two hundred eighty-five billion, five hundred sixty-six million, six hundred ninety-four thousand, four hundred twenty-six".