63389664 has 72 divisors (see below), whose sum is σ = 194142312. Its totient is φ = 19503360.

The previous prime is 63389663. The next prime is 63389701. The reversal of 63389664 is 46698336.

63389664 is a `hidden beast` number, since 633 + 8 + 9 + 6 + 6 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

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

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63389663) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4722 + ... + 12209.

It is an arithmetic number, because the mean of its divisors is an integer number (2696421).

Almost surely, 2^63389664 is an apocalyptic number.

It is an amenable number.

63389664 is an abundant number, since it is smaller than the sum of its proper divisors (130752648).

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

63389664 is a wasteful number, since it uses less digits than its factorization.

63389664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16960 (or 16949 counting only the distinct ones).

The product of its digits is 559872, while the sum is 45.

The square root of 63389664 is about 7961.7626189180. The cubic root of 63389664 is about 398.7244031223.

The spelling of 63389664 in words is "sixty-three million, three hundred eighty-nine thousand, six hundred sixty-four".