64064521 has 2 divisors, whose sum is σ = 64064522. Its totient is φ = 64064520.

The previous prime is 64064513. The next prime is 64064543. The reversal of 64064521 is 12546046.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55279225 + 8785296 = 7435^2 + 2964^2 .

It is a cyclic number.

It is not a de Polignac number, because 64064521 - 2³ = 64064513 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 64064521.

It is not a weakly prime, because it can be changed into another prime (64014521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32032260 + 32032261.

It is an arithmetic number, because the mean of its divisors is an integer number (32032261).

Almost surely, 2^64064521 is an apocalyptic number.

It is an amenable number.

64064521 is a deficient number, since it is larger than the sum of its proper divisors (1).

64064521 is an equidigital number, since it uses as much as digits as its factorization.

64064521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 64064521 is about 8004.0315466645. The cubic root of 64064521 is about 400.1343736043.

The spelling of 64064521 in words is "sixty-four million, sixty-four thousand, five hundred twenty-one".