646332385608 has 1024 divisors, whose sum is σ = 2329179955200. Its totient is φ = 163621472256.

The previous prime is 646332385591. The next prime is 646332385613. The reversal of 646332385608 is 806583233646.

646332385608 is a `hidden beast` number, since 6 + 4 + 6 + 3 + 3 + 23 + 8 + 5 + 608 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 7787137135 + ... + 7787137217.

It is an arithmetic number, because the mean of its divisors is an integer number (2274589800).

Almost surely, 2^646332385608 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 646332385608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1164589977600).

646332385608 is an abundant number, since it is smaller than the sum of its proper divisors (1682847569592).

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

646332385608 is a wasteful number, since it uses less digits than its factorization.

646332385608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270 (or 248 counting only the distinct ones).

The product of its (nonzero) digits is 14929920, while the sum is 54.

The spelling of 646332385608 in words is "six hundred forty-six billion, three hundred thirty-two million, three hundred eighty-five thousand, six hundred eight".