863521223040 has 768 divisors, whose sum is σ = 3550886277120. Its totient is φ = 196435943424.

The previous prime is 863521223039. The next prime is 863521223053. The reversal of 863521223040 is 40322125368.

863521223040 is a `hidden beast` number, since 8 + 63 + 521 + 2 + 2 + 30 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 863521222986 and 863521223004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 242764942 + ... + 242768498.

It is an arithmetic number, because the mean of its divisors is an integer number (4623549840).

Almost surely, 2^863521223040 is an apocalyptic number.

863521223040 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 863521223040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1775443138560).

863521223040 is an abundant number, since it is smaller than the sum of its proper divisors (2687365054080).

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

863521223040 is a wasteful number, since it uses less digits than its factorization.

863521223040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3821 (or 3797 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

The spelling of 863521223040 in words is "eight hundred sixty-three billion, five hundred twenty-one million, two hundred twenty-three thousand, forty".