646752951552 has 72 divisors (see below), whose sum is σ = 1725073502656. Its totient is φ = 215112462336.

The previous prime is 646752951521. The next prime is 646752951601. The reversal of 646752951552 is 255159257646.

It is a junction number, because it is equal to n+sod(n) for n = 646752951492 and 646752951501.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 570388 + ... + 1272339.

Almost surely, 2^646752951552 is an apocalyptic number.

It is an amenable number.

646752951552 is an abundant number, since it is smaller than the sum of its proper divisors (1078320551104).

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

646752951552 is a wasteful number, since it uses less digits than its factorization.

646752951552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1843203 (or 1843189 counting only the distinct ones).

The product of its digits is 22680000, while the sum is 57.

The spelling of 646752951552 in words is "six hundred forty-six billion, seven hundred fifty-two million, nine hundred fifty-one thousand, five hundred fifty-two".