646902852552 has 192 divisors, whose sum is σ = 1972718841600. Its totient is φ = 189831438720.

The previous prime is 646902852551. The next prime is 646902852559. The reversal of 646902852552 is 255258209646.

It is a happy number.

646902852552 is a `hidden beast` number, since 6 + 4 + 6 + 9 + 0 + 2 + 85 + 2 + 552 = 666.

646902852552 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (646902852551) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3027463 + ... + 3234089.

It is an arithmetic number, because the mean of its divisors is an integer number (10274577300).

Almost surely, 2^646902852552 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 646902852552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (986359420800).

646902852552 is an abundant number, since it is smaller than the sum of its proper divisors (1325815989048).

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

646902852552 is a wasteful number, since it uses less digits than its factorization.

646902852552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206776 (or 206769 counting only the distinct ones).

The product of its (nonzero) digits is 10368000, while the sum is 54.

The spelling of 646902852552 in words is "six hundred forty-six billion, nine hundred two million, eight hundred fifty-two thousand, five hundred fifty-two".