6648863840 has 48 divisors (see below), whose sum is σ = 15743095200. Its totient is φ = 2653593600.

The previous prime is 6648863821. The next prime is 6648863869. The reversal of 6648863840 is 483688466.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25565 + ... + 118115.

It is an arithmetic number, because the mean of its divisors is an integer number (327981150).

Almost surely, 2^6648863840 is an apocalyptic number.

It is an amenable number.

6648863840 is an abundant number, since it is smaller than the sum of its proper divisors (9094231360).

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

6648863840 is a wasteful number, since it uses less digits than its factorization.

6648863840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93015 (or 93007 counting only the distinct ones).

The product of its (nonzero) digits is 5308416, while the sum is 53.

The square root of 6648863840 is about 81540.5656100079. The cubic root of 6648863840 is about 1880.3952541520.

The spelling of 6648863840 in words is "six billion, six hundred forty-eight million, eight hundred sixty-three thousand, eight hundred forty".