646600573650 has 48 divisors (see below), whose sum is σ = 1605917509344. Its totient is φ = 172174337280.

The previous prime is 646600573621. The next prime is 646600573657. The reversal of 646600573650 is 56375006646.

It is a self number, because there is not a number n which added to its sum of digits gives 646600573650.

It is not an unprimeable number, because it can be changed into a prime (646600573657) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3053239 + ... + 3258138.

It is an arithmetic number, because the mean of its divisors is an integer number (33456614778).

Almost surely, 2^646600573650 is an apocalyptic number.

646600573650 is an abundant number, since it is smaller than the sum of its proper divisors (959316935694).

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

646600573650 is a wasteful number, since it uses less digits than its factorization.

646600573650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6312075 (or 6312070 counting only the distinct ones).

The product of its (nonzero) digits is 2721600, while the sum is 48.

The spelling of 646600573650 in words is "six hundred forty-six billion, six hundred million, five hundred seventy-three thousand, six hundred fifty".