64544004 has 72 divisors (see below), whose sum is σ = 191038848. Its totient is φ = 17988480.

The previous prime is 64543993. The next prime is 64544033. The reversal of 64544004 is 40044546.

64544004 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7209 + ... + 13455.

Almost surely, 2^64544004 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64544004, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95519424).

64544004 is an abundant number, since it is smaller than the sum of its proper divisors (126494844).

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

64544004 is a wasteful number, since it uses less digits than its factorization.

64544004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6305 (or 6300 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 27.

The square root of 64544004 is about 8033.9283043851. The cubic root of 64544004 is about 401.1301455869.

The spelling of 64544004 in words is "sixty-four million, five hundred forty-four thousand, four".