646865050 has 48 divisors (see below), whose sum is σ = 1299104352. Its totient is φ = 238219200.

The previous prime is 646865047. The next prime is 646865059. The reversal of 646865050 is 50568646.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 646864994 and 646865012.

It is not an unprimeable number, because it can be changed into a prime (646865059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 302485 + ... + 304615.

It is an arithmetic number, because the mean of its divisors is an integer number (27064674).

Almost surely, 2^646865050 is an apocalyptic number.

646865050 is an abundant number, since it is smaller than the sum of its proper divisors (652239302).

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

646865050 is a wasteful number, since it uses less digits than its factorization.

646865050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2623 (or 2618 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 40.

The square root of 646865050 is about 25433.5418296391. The cubic root of 646865050 is about 864.8442367128.

The spelling of 646865050 in words is "six hundred forty-six million, eight hundred sixty-five thousand, fifty".