64575668652 has 72 divisors (see below), whose sum is σ = 165840162096. Its totient is φ = 19542336000.

The previous prime is 64575668623. The next prime is 64575668693. The reversal of 64575668652 is 25686657546.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1075752 + ... + 1134192.

Almost surely, 2^64575668652 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 64575668652, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82920081048).

64575668652 is an abundant number, since it is smaller than the sum of its proper divisors (101264493444).

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

64575668652 is a wasteful number, since it uses less digits than its factorization.

64575668652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59231 (or 59218 counting only the distinct ones).

The product of its digits is 72576000, while the sum is 60.

The spelling of 64575668652 in words is "sixty-four billion, five hundred seventy-five million, six hundred sixty-eight thousand, six hundred fifty-two".