863220636672 has 352 divisors, whose sum is σ = 2479305438720. Its totient is φ = 266184622080.

The previous prime is 863220636601. The next prime is 863220636689. The reversal of 863220636672 is 276636022368.

863220636672 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 813591022 + ... + 813592082.

It is an arithmetic number, because the mean of its divisors is an integer number (7043481360).

Almost surely, 2^863220636672 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 863220636672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1239652719360).

863220636672 is an abundant number, since it is smaller than the sum of its proper divisors (1616084802048).

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

863220636672 is a wasteful number, since it uses less digits than its factorization.

863220636672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1419 (or 1401 counting only the distinct ones).

The product of its (nonzero) digits is 5225472, while the sum is 51.

The spelling of 863220636672 in words is "eight hundred sixty-three billion, two hundred twenty million, six hundred thirty-six thousand, six hundred seventy-two".