64464521 has 16 divisors (see below), whose sum is σ = 72576000. Its totient is φ = 56758800.

The previous prime is 64464503. The next prime is 64464529. The reversal of 64464521 is 12546446.

It is a cyclic number.

It is not a de Polignac number, because 64464521 - 2¹⁸ = 64202377 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (64464529) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45380 + ... + 46778.

It is an arithmetic number, because the mean of its divisors is an integer number (4536000).

Almost surely, 2^64464521 is an apocalyptic number.

It is an amenable number.

64464521 is a deficient number, since it is larger than the sum of its proper divisors (8111479).

64464521 is a wasteful number, since it uses less digits than its factorization.

64464521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1540.

The product of its digits is 23040, while the sum is 32.

The square root of 64464521 is about 8028.9800722134. The cubic root of 64464521 is about 400.9654201187.

The spelling of 64464521 in words is "sixty-four million, four hundred sixty-four thousand, five hundred twenty-one".