866853445192 has 32 divisors (see below), whose sum is σ = 1863055134720. Its totient is φ = 370406211840.

The previous prime is 866853445153. The next prime is 866853445309. The reversal of 866853445192 is 291544358668.

It is a self number, because there is not a number n which added to its sum of digits gives 866853445192.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22947784 + ... + 22985527.

It is an arithmetic number, because the mean of its divisors is an integer number (58220472960).

Almost surely, 2^866853445192 is an apocalyptic number.

It is an amenable number.

866853445192 is an abundant number, since it is smaller than the sum of its proper divisors (996201689528).

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

866853445192 is a wasteful number, since it uses less digits than its factorization.

866853445192 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45933661 (or 45933657 counting only the distinct ones).

The product of its digits is 49766400, while the sum is 61.

The spelling of 866853445192 in words is "eight hundred sixty-six billion, eight hundred fifty-three million, four hundred forty-five thousand, one hundred ninety-two".