646454600648 has 32 divisors (see below), whose sum is σ = 1240412823360. Its totient is φ = 315731582400.

The previous prime is 646454600633. The next prime is 646454600663. The reversal of 646454600648 is 846006454646.

It is an interprime number because it is at equal distance from previous prime (646454600633) and next prime (646454600663).

It is a Harshad number since it is a multiple of its sum of digits (53).

It is a self number, because there is not a number n which added to its sum of digits gives 646454600648.

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, 3262028 + ... + 3454523.

It is an arithmetic number, because the mean of its divisors is an integer number (38762900730).

Almost surely, 2^646454600648 is an apocalyptic number.

It is an amenable number.

646454600648 is a deficient number, since it is larger than the sum of its proper divisors (593958222712).

646454600648 is a wasteful number, since it uses less digits than its factorization.

646454600648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6716837 (or 6716833 counting only the distinct ones).

The product of its (nonzero) digits is 13271040, while the sum is 53.

The spelling of 646454600648 in words is "six hundred forty-six billion, four hundred fifty-four million, six hundred thousand, six hundred forty-eight".