646913949068 has 12 divisors (see below), whose sum is σ = 1134713962200. Its totient is φ = 322709959872.

The previous prime is 646913948987. The next prime is 646913949079. The reversal of 646913949068 is 860949319646.

It is a junction number, because it is equal to n+sod(n) for n = 646913948995 and 646913949013.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 186751718 + ... + 186755181.

It is an arithmetic number, because the mean of its divisors is an integer number (94559496850).

Almost surely, 2^646913949068 is an apocalyptic number.

It is an amenable number.

646913949068 is a deficient number, since it is larger than the sum of its proper divisors (487800013132).

646913949068 is a wasteful number, since it uses less digits than its factorization.

646913949068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 373507336 (or 373507334 counting only the distinct ones).

The product of its (nonzero) digits is 60466176, while the sum is 65.

The spelling of 646913949068 in words is "six hundred forty-six billion, nine hundred thirteen million, nine hundred forty-nine thousand, sixty-eight".