646313532356 has 24 divisors (see below), whose sum is σ = 1137787197120. Its totient is φ = 321232135712.

The previous prime is 646313532317. The next prime is 646313532367. The reversal of 646313532356 is 653235313646.

It is a self number, because there is not a number n which added to its sum of digits gives 646313532356.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3988835 + ... + 4147701.

It is an arithmetic number, because the mean of its divisors is an integer number (47407799880).

Almost surely, 2^646313532356 is an apocalyptic number.

It is an amenable number.

646313532356 is a deficient number, since it is larger than the sum of its proper divisors (491473664764).

646313532356 is a wasteful number, since it uses less digits than its factorization.

646313532356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164923 (or 164921 counting only the distinct ones).

The product of its digits is 3499200, while the sum is 47.

The spelling of 646313532356 in words is "six hundred forty-six billion, three hundred thirteen million, five hundred thirty-two thousand, three hundred fifty-six".