285500989837 has 12 divisors (see below), whose sum is σ = 338379689916. Its totient is φ = 240097865280.

The previous prime is 285500989811. The next prime is 285500989861. The reversal of 285500989837 is 738989005582.

It can be written as a sum of positive squares in 2 ways, for example, as 89646946921 + 195854042916 = 299411^2 + 442554^2 .

It is a de Polignac number, because none of the positive numbers 2^k-285500989837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285500989867) 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 11 ways as a sum of consecutive naturals, for example, 54964864 + ... + 54970057.

It is an arithmetic number, because the mean of its divisors is an integer number (28198307493).

Almost surely, 2^285500989837 is an apocalyptic number.

It is an amenable number.

285500989837 is a deficient number, since it is larger than the sum of its proper divisors (52878700079).

285500989837 is a wasteful number, since it uses less digits than its factorization.

285500989837 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109934988 (or 109934981 counting only the distinct ones).

The product of its (nonzero) digits is 43545600, while the sum is 64.

The spelling of 285500989837 in words is "two hundred eighty-five billion, five hundred million, nine hundred eighty-nine thousand, eight hundred thirty-seven".