809861848128 has 112 divisors (see below), whose sum is σ = 2381072728320. Its totient is φ = 269928000000.

The previous prime is 809861848099. The next prime is 809861848141. The reversal of 809861848128 is 821848168908.

809861848128 is a `hidden beast` number, since 8 + 0 + 9 + 8 + 618 + 4 + 8 + 1 + 2 + 8 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28153753 + ... + 28182503.

Almost surely, 2^809861848128 is an apocalyptic number.

It is an amenable number.

809861848128 is an abundant number, since it is smaller than the sum of its proper divisors (1571210880192).

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

809861848128 is a wasteful number, since it uses less digits than its factorization.

809861848128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45073 (or 45057 counting only the distinct ones).

The product of its (nonzero) digits is 14155776, while the sum is 63.

The spelling of 809861848128 in words is "eight hundred nine billion, eight hundred sixty-one million, eight hundred forty-eight thousand, one hundred twenty-eight".