863247399552 has 192 divisors, whose sum is σ = 2540624486400. Its totient is φ = 281241212928.

The previous prime is 863247399527. The next prime is 863247399571. The reversal of 863247399552 is 255993742368.

863247399552 is a `hidden beast` number, since 8 + 6 + 3 + 2 + 4 + 73 + 9 + 9 + 552 = 666.

It is a tau number, because it is divible by the number of its divisors (192).

It is a self number, because there is not a number n which added to its sum of digits gives 863247399552.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16030849 + ... + 16084607.

It is an arithmetic number, because the mean of its divisors is an integer number (13232419200).

Almost surely, 2^863247399552 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 863247399552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1270312243200).

863247399552 is an abundant number, since it is smaller than the sum of its proper divisors (1677377086848).

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

863247399552 is a wasteful number, since it uses less digits than its factorization.

863247399552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54095 (or 54080 counting only the distinct ones).

The product of its digits is 97977600, while the sum is 63.

It can be divided in two parts, 8632473 and 99552, that added together give a square (8732025 = 2955²).

The spelling of 863247399552 in words is "eight hundred sixty-three billion, two hundred forty-seven million, three hundred ninety-nine thousand, five hundred fifty-two".