64604576477321 has 16 divisors (see below), whose sum is σ = 66909726016848. Its totient is φ = 62339877600000.

The previous prime is 64604576477297. The next prime is 64604576477323. The reversal of 64604576477321 is 12377467540646.

64604576477321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 1733077463296 + 62871499014025 = 1316464^2 + 7929155^2 .

It is a cyclic number.

It is not a de Polignac number, because 64604576477321 - 2⁴² = 60206529966217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64604576477323) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 29451071 + ... + 31568571.

It is an arithmetic number, because the mean of its divisors is an integer number (4181857876053).

Almost surely, 2^{64604576477321} is an apocalyptic number.

64604576477321 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

It is an amenable number.

64604576477321 is a deficient number, since it is larger than the sum of its proper divisors (2305149539527).

64604576477321 is a wasteful number, since it uses less digits than its factorization.

64604576477321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2127052.

The product of its (nonzero) digits is 142248960, while the sum is 62.

The spelling of 64604576477321 in words is "sixty-four trillion, six hundred four billion, five hundred seventy-six million, four hundred seventy-seven thousand, three hundred twenty-one".