285636075366840 has 384 divisors, whose sum is σ = 944231645448000. Its totient is φ = 69073175142400.

The previous prime is 285636075366751. The next prime is 285636075366871. The reversal of 285636075366840 is 48663570636582.

It is a happy number.

It is a super-2 number, since 2×285636075366840² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 95 ways as a sum of consecutive naturals, for example, 14744019394 + ... + 14744038766.

Almost surely, 2^{285636075366840} is an apocalyptic number.

285636075366840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 285636075366840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (472115822724000).

285636075366840 is an abundant number, since it is smaller than the sum of its proper divisors (658595570081160).

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

285636075366840 is a wasteful number, since it uses less digits than its factorization.

285636075366840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21879 (or 21864 counting only the distinct ones).

The product of its (nonzero) digits is 1045094400, while the sum is 69.

The spelling of 285636075366840 in words is "two hundred eighty-five trillion, six hundred thirty-six billion, seventy-five million, three hundred sixty-six thousand, eight hundred forty".