64469664 has 144 divisors (see below), whose sum is σ = 212127552. Its totient is φ = 18192384.

The previous prime is 64469659. The next prime is 64469701. The reversal of 64469664 is 46696446.

It is a tau number, because it is divible by the number of its divisors (144).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 227667 + ... + 227949.

It is an arithmetic number, because the mean of its divisors is an integer number (1473108).

Almost surely, 2^64469664 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 64469664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106063776).

64469664 is an abundant number, since it is smaller than the sum of its proper divisors (147657888).

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

64469664 is a wasteful number, since it uses less digits than its factorization.

64469664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 419 (or 408 counting only the distinct ones).

The product of its digits is 746496, while the sum is 45.

The square root of 64469664 is about 8029.3003431183. The cubic root of 64469664 is about 400.9760828848.

It can be divided in two parts, 6446 and 9664, that added together give a triangular number (16110 = T₁₇₉).

The spelling of 64469664 in words is "sixty-four million, four hundred sixty-nine thousand, six hundred sixty-four".