863863544544000 has 2304 divisors, whose sum is σ = 3931161505689600. Its totient is φ = 165695201280000.

The previous prime is 863863544543957. The next prime is 863863544544019. The reversal of 863863544544000 is 445445368368.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is an unprimeable number.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 4708612270 + ... + 4708795730.

It is an arithmetic number, because the mean of its divisors is an integer number (1706233292400).

Almost surely, 2^{863863544544000} is an apocalyptic number.

863863544544000 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 863863544544000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1965580752844800).

863863544544000 is an abundant number, since it is smaller than the sum of its proper divisors (3067297961145600).

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

863863544544000 is a wasteful number, since it uses less digits than its factorization.

863863544544000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183540 (or 183502 counting only the distinct ones).

The product of its (nonzero) digits is 132710400, while the sum is 60.

The spelling of 863863544544000 in words is "eight hundred sixty-three trillion, eight hundred sixty-three billion, five hundred forty-four million, five hundred forty-four thousand".