64536709049728 has 16 divisors (see below), whose sum is σ = 128569225060260. Its totient is φ = 32268354524800.

The previous prime is 64536709049671. The next prime is 64536709049731. The reversal of 64536709049728 is 82794090763546.

64536709049728 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (16).

It is a congruent number.

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 as a sum of consecutive naturals, namely, 252096519598 + ... + 252096519853.

Almost surely, 2^{64536709049728} is an apocalyptic number.

It is an amenable number.

64536709049728 is a deficient number, since it is larger than the sum of its proper divisors (64032516010532).

64536709049728 is an equidigital number, since it uses as much as digits as its factorization.

64536709049728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 504193039465 (or 504193039453 counting only the distinct ones).

The product of its (nonzero) digits is 548674560, while the sum is 70.

The spelling of 64536709049728 in words is "sixty-four trillion, five hundred thirty-six billion, seven hundred nine million, forty-nine thousand, seven hundred twenty-eight".