646315362 has 256 divisors, whose sum is σ = 1927065600. Its totient is φ = 157464000.

The previous prime is 646315339. The next prime is 646315379. The reversal of 646315362 is 263513646.

646315362 is a `hidden beast` number, since 64 + 63 + 1 + 536 + 2 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 6399112 + ... + 6399212.

It is an arithmetic number, because the mean of its divisors is an integer number (7527600).

Almost surely, 2^646315362 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 646315362, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (963532800).

646315362 is an abundant number, since it is smaller than the sum of its proper divisors (1280750238).

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

646315362 is a wasteful number, since it uses less digits than its factorization.

646315362 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161 (or 143 counting only the distinct ones).

The product of its digits is 77760, while the sum is 36.

The square root of 646315362 is about 25422.7331732841. The cubic root of 646315362 is about 864.5991937313.

The spelling of 646315362 in words is "six hundred forty-six million, three hundred fifteen thousand, three hundred sixty-two".