868563648 has 84 divisors (see below), whose sum is σ = 2581833800. Its totient is φ = 289516032.

The previous prime is 868563637. The next prime is 868563649. The reversal of 868563648 is 846365868.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 868563594 and 868563603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (868563649) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12373 + ... + 43476.

Almost surely, 2^868563648 is an apocalyptic number.

It is an amenable number.

868563648 is an abundant number, since it is smaller than the sum of its proper divisors (1713270152).

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

868563648 is an equidigital number, since it uses as much as digits as its factorization.

868563648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55876 (or 55854 counting only the distinct ones).

The product of its digits is 6635520, while the sum is 54.

The square root of 868563648 is about 29471.4039027665. The cubic root of 868563648 is about 954.1146177702.

The spelling of 868563648 in words is "eight hundred sixty-eight million, five hundred sixty-three thousand, six hundred forty-eight".