646822604 has 24 divisors (see below), whose sum is σ = 1164262848. Its totient is φ = 314202240.

The previous prime is 646822549. The next prime is 646822609. The reversal of 646822604 is 406228646.

It is not an unprimeable number, because it can be changed into a prime (646822609) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 109757 + ... + 115499.

It is an arithmetic number, because the mean of its divisors is an integer number (48510952).

Almost surely, 2^646822604 is an apocalyptic number.

It is an amenable number.

646822604 is a deficient number, since it is larger than the sum of its proper divisors (517440244).

646822604 is a wasteful number, since it uses less digits than its factorization.

646822604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6545 (or 6543 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 38.

The square root of 646822604 is about 25432.7073666961. The cubic root of 646822604 is about 864.8253198453.

The spelling of 646822604 in words is "six hundred forty-six million, eight hundred twenty-two thousand, six hundred four".