863844844272 has 20 divisors (see below), whose sum is σ = 2231599181160. Its totient is φ = 287948281408.

The previous prime is 863844844271. The next prime is 863844844283. The reversal of 863844844272 is 272448448368.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (863844844271) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8998383747 + ... + 8998383842.

It is an arithmetic number, because the mean of its divisors is an integer number (111579959058).

Almost surely, 2^863844844272 is an apocalyptic number.

It is an amenable number.

863844844272 is an abundant number, since it is smaller than the sum of its proper divisors (1367754336888).

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

863844844272 is a wasteful number, since it uses less digits than its factorization.

863844844272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17996767600 (or 17996767594 counting only the distinct ones).

The product of its digits is 66060288, while the sum is 60.

The spelling of 863844844272 in words is "eight hundred sixty-three billion, eight hundred forty-four million, eight hundred forty-four thousand, two hundred seventy-two".