646238108104 has 64 divisors (see below), whose sum is σ = 1307965501440. Its totient is φ = 298458684480.

The previous prime is 646238108101. The next prime is 646238108123. The reversal of 646238108104 is 401801832646.

It is not an unprimeable number, because it can be changed into a prime (646238108101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2542467 + ... + 2785069.

It is an arithmetic number, because the mean of its divisors is an integer number (20436960960).

Almost surely, 2^646238108104 is an apocalyptic number.

It is an amenable number.

646238108104 is an abundant number, since it is smaller than the sum of its proper divisors (661727393336).

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

646238108104 is a wasteful number, since it uses less digits than its factorization.

646238108104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243130 (or 243126 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 43.

The spelling of 646238108104 in words is "six hundred forty-six billion, two hundred thirty-eight million, one hundred eight thousand, one hundred four".