641685304 has 16 divisors (see below), whose sum is σ = 1295710920. Its totient is φ = 296162400.

The previous prime is 641685287. The next prime is 641685307. The reversal of 641685304 is 403586146.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641685307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3084922 + ... + 3085129.

Almost surely, 2^641685304 is an apocalyptic number.

It is an amenable number.

641685304 is an abundant number, since it is smaller than the sum of its proper divisors (654025616).

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

641685304 is a wasteful number, since it uses less digits than its factorization.

641685304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6170070 (or 6170066 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 37.

The square root of 641685304 is about 25331.5081272316. The cubic root of 641685304 is about 862.5296458059.

The spelling of 641685304 in words is "six hundred forty-one million, six hundred eighty-five thousand, three hundred four".