646318745260 has 48 divisors (see below), whose sum is σ = 1374617180160. Its totient is φ = 255223949760.

The previous prime is 646318745227. The next prime is 646318745297. The reversal of 646318745260 is 62547813646.

It is a junction number, because it is equal to n+sod(n) for n = 646318745198 and 646318745207.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16398097 + ... + 16437463.

It is an arithmetic number, because the mean of its divisors is an integer number (28637857920).

Almost surely, 2^646318745260 is an apocalyptic number.

It is an amenable number.

646318745260 is an abundant number, since it is smaller than the sum of its proper divisors (728298434900).

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

646318745260 is a wasteful number, since it uses less digits than its factorization.

646318745260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49846 (or 49844 counting only the distinct ones).

The product of its (nonzero) digits is 5806080, while the sum is 52.

The spelling of 646318745260 in words is "six hundred forty-six billion, three hundred eighteen million, seven hundred forty-five thousand, two hundred sixty".