646018848 has 384 divisors, whose sum is σ = 2177280000. Its totient is φ = 185213952.

The previous prime is 646018843. The next prime is 646018883. The reversal of 646018848 is 848810646.

646018848 is a `hidden beast` number, since 6 + 460 + 188 + 4 + 8 = 666.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (646018843) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 10949443 + ... + 10949501.

It is an arithmetic number, because the mean of its divisors is an integer number (5670000).

Almost surely, 2^646018848 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 646018848, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1088640000).

646018848 is an abundant number, since it is smaller than the sum of its proper divisors (1531261152).

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

646018848 is a wasteful number, since it uses less digits than its factorization.

646018848 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149 (or 135 counting only the distinct ones).

The product of its (nonzero) digits is 294912, while the sum is 45.

The square root of 646018848 is about 25416.9008338940. The cubic root of 646018848 is about 864.4669543762.

The spelling of 646018848 in words is "six hundred forty-six million, eighteen thousand, eight hundred forty-eight".