285793820505 has 16 divisors (see below), whose sum is σ = 508077903360. Its totient is φ = 152423370864.

The previous prime is 285793820503. The next prime is 285793820527. The reversal of 285793820505 is 505028397582.

285793820505 is a `hidden beast` number, since 2 + 8 + 57 + 9 + 3 + 82 + 0 + 505 = 666.

It is not a de Polignac number, because 285793820505 - 2¹ = 285793820503 is a prime.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (285793820503) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 1058495497 + ... + 1058495766.

It is an arithmetic number, because the mean of its divisors is an integer number (31754868960).

Almost surely, 2^285793820505 is an apocalyptic number.

It is an amenable number.

285793820505 is a deficient number, since it is larger than the sum of its proper divisors (222284082855).

285793820505 is a wasteful number, since it uses less digits than its factorization.

285793820505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2116991277 (or 2116991271 counting only the distinct ones).

The product of its (nonzero) digits is 6048000, while the sum is 54.

The spelling of 285793820505 in words is "two hundred eighty-five billion, seven hundred ninety-three million, eight hundred twenty thousand, five hundred five".