646145000644 has 24 divisors (see below), whose sum is σ = 1328437974528. Its totient is φ = 271109790240.

The previous prime is 646145000563. The next prime is 646145000651. The reversal of 646145000644 is 446000541646.

It is a junction number, because it is equal to n+sod(n) for n = 646145000597 and 646145000606.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 564811492 + ... + 564812635.

It is an arithmetic number, because the mean of its divisors is an integer number (55351582272).

Almost surely, 2^646145000644 is an apocalyptic number.

It is an amenable number.

646145000644 is an abundant number, since it is smaller than the sum of its proper divisors (682292973884).

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

646145000644 is a wasteful number, since it uses less digits than its factorization.

646145000644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1129624155 (or 1129624153 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 40.

The spelling of 646145000644 in words is "six hundred forty-six billion, one hundred forty-five million, six hundred forty-four", and thus it is an aban number.