64564404 has 48 divisors (see below), whose sum is σ = 157852800. Its totient is φ = 20500480.

The previous prime is 64564403. The next prime is 64564447. The reversal of 64564404 is 40446546.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64564403) 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, 123664 + ... + 124184.

It is an arithmetic number, because the mean of its divisors is an integer number (3288600).

Almost surely, 2^64564404 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 64564404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78926400).

64564404 is an abundant number, since it is smaller than the sum of its proper divisors (93288396).

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

64564404 is a wasteful number, since it uses less digits than its factorization.

64564404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1000 (or 998 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 33.

The square root of 64564404 is about 8035.1978195935. The cubic root of 64564404 is about 401.1724019933.

The spelling of 64564404 in words is "sixty-four million, five hundred sixty-four thousand, four hundred four".