641616604 has 6 divisors (see below), whose sum is σ = 1122829064. Its totient is φ = 320808300.

The previous prime is 641616587. The next prime is 641616611. The reversal of 641616604 is 406616146.

It is a self number, because there is not a number n which added to its sum of digits gives 641616604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80202072 + ... + 80202079.

Almost surely, 2^641616604 is an apocalyptic number.

It is an amenable number.

641616604 is a deficient number, since it is larger than the sum of its proper divisors (481212460).

641616604 is a wasteful number, since it uses less digits than its factorization.

641616604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160404155 (or 160404153 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 641616604 is about 25330.1520721846. The cubic root of 641616604 is about 862.4988633745.

The spelling of 641616604 in words is "six hundred forty-one million, six hundred sixteen thousand, six hundred four".