646255296 has 84 divisors (see below), whose sum is σ = 1856054200. Its totient is φ = 214990848.

The previous prime is 646255279. The next prime is 646255301. The reversal of 646255296 is 692552646.

It is a happy number.

646255296 is a `hidden beast` number, since 6 + 4 + 6 + 2 + 552 + 96 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 442215 + ... + 443673.

Almost surely, 2^646255296 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 646255296, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (928027100).

646255296 is an abundant number, since it is smaller than the sum of its proper divisors (1209798904).

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

646255296 is a wasteful number, since it uses less digits than its factorization.

646255296 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2246 (or 2233 counting only the distinct ones).

The product of its digits is 777600, while the sum is 45.

The square root of 646255296 is about 25421.5518015718. The cubic root of 646255296 is about 864.5724087555.

The spelling of 646255296 in words is "six hundred forty-six million, two hundred fifty-five thousand, two hundred ninety-six".