63265664 has 128 divisors (see below), whose sum is σ = 161568000. Its totient is φ = 24460800.

The previous prime is 63265661. The next prime is 63265703. The reversal of 63265664 is 46656236.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63265661) 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, 482879 + ... + 483009.

It is an arithmetic number, because the mean of its divisors is an integer number (1262250).

Almost surely, 2^63265664 is an apocalyptic number.

63265664 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 63265664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80784000).

63265664 is an abundant number, since it is smaller than the sum of its proper divisors (98302336).

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

63265664 is a wasteful number, since it uses less digits than its factorization.

63265664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177 (or 151 counting only the distinct ones).

The product of its digits is 155520, while the sum is 38.

The square root of 63265664 is about 7953.9715865723. The cubic root of 63265664 is about 398.4642445172.

The spelling of 63265664 in words is "sixty-three million, two hundred sixty-five thousand, six hundred sixty-four".