64064644 has 24 divisors (see below), whose sum is σ = 128488640. Its totient is φ = 27379296.

The previous prime is 64064617. The next prime is 64064657. The reversal of 64064644 is 44646046.

It is a super-2 number, since 2×64064644² = 8208557221693472, which contains 22 as substring.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 7594 + ... + 13630.

Almost surely, 2^64064644 is an apocalyptic number.

It is an amenable number.

64064644 is an abundant number, since it is smaller than the sum of its proper divisors (64423996).

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

64064644 is a wasteful number, since it uses less digits than its factorization.

64064644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6427 (or 6425 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 34.

The square root of 64064644 is about 8004.0392302887. The cubic root of 64064644 is about 400.1346296820.

The spelling of 64064644 in words is "sixty-four million, sixty-four thousand, six hundred forty-four".