646680425846 has 32 divisors (see below), whose sum is σ = 1194077982720. Its totient is φ = 255785384736.

The previous prime is 646680425827. The next prime is 646680425849. The reversal of 646680425846 is 648524086646.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646680425849) 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, 758435 + ... + 1366961.

It is an arithmetic number, because the mean of its divisors is an integer number (37314936960).

Almost surely, 2^646680425846 is an apocalyptic number.

646680425846 is a deficient number, since it is larger than the sum of its proper divisors (547397556874).

646680425846 is a wasteful number, since it uses less digits than its factorization.

646680425846 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 614388.

The product of its (nonzero) digits is 53084160, while the sum is 59.

The spelling of 646680425846 in words is "six hundred forty-six billion, six hundred eighty million, four hundred twenty-five thousand, eight hundred forty-six".