285199876956 has 12 divisors (see below), whose sum is σ = 665466379592. Its totient is φ = 95066625648.

The previous prime is 285199876937. The next prime is 285199876963. The reversal of 285199876956 is 659678991582.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent 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 3 ways as a sum of consecutive naturals, for example, 11883328195 + ... + 11883328218.

Almost surely, 2^285199876956 is an apocalyptic number.

It is an amenable number.

285199876956 is an abundant number, since it is smaller than the sum of its proper divisors (380266502636).

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

285199876956 is a wasteful number, since it uses less digits than its factorization.

285199876956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23766656420 (or 23766656418 counting only the distinct ones).

The product of its digits is 587865600, while the sum is 75.

The spelling of 285199876956 in words is "two hundred eighty-five billion, one hundred ninety-nine million, eight hundred seventy-six thousand, nine hundred fifty-six".