641674648 has 16 divisors (see below), whose sum is σ = 1244628000. Its totient is φ = 309773856.

The previous prime is 641674601. The next prime is 641674697. The reversal of 641674648 is 846476146.

It is a junction number, because it is equal to n+sod(n) for n = 641674598 and 641674607.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1382688 + ... + 1383151.

It is an arithmetic number, because the mean of its divisors is an integer number (77789250).

Almost surely, 2^641674648 is an apocalyptic number.

It is an amenable number.

641674648 is a deficient number, since it is larger than the sum of its proper divisors (602953352).

641674648 is a wasteful number, since it uses less digits than its factorization.

641674648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2765874 (or 2765870 counting only the distinct ones).

The product of its digits is 774144, while the sum is 46.

The square root of 641674648 is about 25331.2977954151. The cubic root of 641674648 is about 862.5248713125.

The spelling of 641674648 in words is "six hundred forty-one million, six hundred seventy-four thousand, six hundred forty-eight".