64646581266352 has 40 divisors (see below), whose sum is σ = 130701540039264. Its totient is φ = 30917216461824.

The previous prime is 64646581266317. The next prime is 64646581266401. The reversal of 64646581266352 is 25366218564646.

64646581266352 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14110138 + ... + 18121510.

Almost surely, 2^{64646581266352} is an apocalyptic number.

It is an amenable number.

64646581266352 is an abundant number, since it is smaller than the sum of its proper divisors (66054958772912).

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

64646581266352 is a wasteful number, since it uses less digits than its factorization.

64646581266352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4055197 (or 4055191 counting only the distinct ones).

The product of its digits is 298598400, while the sum is 64.

The spelling of 64646581266352 in words is "sixty-four trillion, six hundred forty-six billion, five hundred eighty-one million, two hundred sixty-six thousand, three hundred fifty-two".