285785099806 has 16 divisors (see below), whose sum is σ = 462740493600. Its totient is φ = 131966732128.

The previous prime is 285785099801. The next prime is 285785099819. The reversal of 285785099806 is 608990587582.

It is a super-2 number, since 2×285785099806² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285785099801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 107114521 + ... + 107117188.

It is an arithmetic number, because the mean of its divisors is an integer number (28921280850).

Almost surely, 2^285785099806 is an apocalyptic number.

285785099806 is a deficient number, since it is larger than the sum of its proper divisors (176955393794).

285785099806 is a wasteful number, since it uses less digits than its factorization.

285785099806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214231763.

The product of its (nonzero) digits is 87091200, while the sum is 67.

The spelling of 285785099806 in words is "two hundred eighty-five billion, seven hundred eighty-five million, ninety-nine thousand, eight hundred six".