863665447728 has 40 divisors (see below), whose sum is σ = 2231867878000. Its totient is φ = 287794013184.

The previous prime is 863665447663. The next prime is 863665447741. The reversal of 863665447728 is 827744566368.

It is a happy number.

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, 2804293 + ... + 3096996.

It is an arithmetic number, because the mean of its divisors is an integer number (55796696950).

Almost surely, 2^863665447728 is an apocalyptic number.

It is an amenable number.

863665447728 is an abundant number, since it is smaller than the sum of its proper divisors (1368202430272).

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

863665447728 is a wasteful number, since it uses less digits than its factorization.

863665447728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5904349 (or 5904343 counting only the distinct ones).

The product of its digits is 325140480, while the sum is 66.

The spelling of 863665447728 in words is "eight hundred sixty-three billion, six hundred sixty-five million, four hundred forty-seven thousand, seven hundred twenty-eight".