64564243305456 has 40 divisors (see below), whose sum is σ = 166791305585920. Its totient is φ = 21521370085056.

The previous prime is 64564243305439. The next prime is 64564243305511. The reversal of 64564243305456 is 65450334246546.

It is a super-2 number, since 2×64564243305456² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 64564243305396 and 64564243305405.

It is a congruent number.

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, 29031465 + ... + 31176183.

It is an arithmetic number, because the mean of its divisors is an integer number (4169782639648).

Almost surely, 2^{64564243305456} is an apocalyptic number.

It is an amenable number.

64564243305456 is an abundant number, since it is smaller than the sum of its proper divisors (102227062280464).

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

64564243305456 is a wasteful number, since it uses less digits than its factorization.

64564243305456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2771893 (or 2771887 counting only the distinct ones).

The product of its (nonzero) digits is 124416000, while the sum is 57.

The spelling of 64564243305456 in words is "sixty-four trillion, five hundred sixty-four billion, two hundred forty-three million, three hundred five thousand, four hundred fifty-six".