646453617464 has 8 divisors (see below), whose sum is σ = 1212100532760. Its totient is φ = 323226808728.

The previous prime is 646453617373. The next prime is 646453617473. The reversal of 646453617464 is 464716354646.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40403351084 + ... + 40403351099.

It is an arithmetic number, because the mean of its divisors is an integer number (151512566595).

Almost surely, 2^646453617464 is an apocalyptic number.

It is an amenable number.

646453617464 is a deficient number, since it is larger than the sum of its proper divisors (565646915296).

646453617464 is a wasteful number, since it uses less digits than its factorization.

646453617464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80806702189 (or 80806702185 counting only the distinct ones).

The product of its digits is 34836480, while the sum is 56.

The spelling of 646453617464 in words is "six hundred forty-six billion, four hundred fifty-three million, six hundred seventeen thousand, four hundred sixty-four".