646363368 has 128 divisors (see below), whose sum is σ = 2122848000. Its totient is φ = 178295040.

The previous prime is 646363363. The next prime is 646363387. The reversal of 646363368 is 863363646.

646363368 is a `hidden beast` number, since 6 + 4 + 6 + 3 + 633 + 6 + 8 = 666.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (646363363) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 36478 + ... + 51218.

It is an arithmetic number, because the mean of its divisors is an integer number (16584750).

Almost surely, 2^646363368 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 646363368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1061424000).

646363368 is an abundant number, since it is smaller than the sum of its proper divisors (1476484632).

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

646363368 is a wasteful number, since it uses less digits than its factorization.

646363368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14792 (or 14782 counting only the distinct ones).

The product of its digits is 1119744, while the sum is 45.

The square root of 646363368 is about 25423.6773107275. The cubic root of 646363368 is about 864.6205996495.

The spelling of 646363368 in words is "six hundred forty-six million, three hundred sixty-three thousand, three hundred sixty-eight".