63664500 has 48 divisors (see below), whose sum is σ = 185395392. Its totient is φ = 16976800.

The previous prime is 63664487. The next prime is 63664537. The reversal of 63664500 is 546636.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19722 + ... + 22721.

It is an arithmetic number, because the mean of its divisors is an integer number (3862404).

Almost surely, 2^63664500 is an apocalyptic number.

63664500 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

63664500 is an abundant number, since it is smaller than the sum of its proper divisors (121730892).

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

63664500 is a wasteful number, since it uses less digits than its factorization.

63664500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42465 (or 42453 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 30.

The square root of 63664500 is about 7979.0036972043. The cubic root of 63664500 is about 399.2998167403.

The spelling of 63664500 in words is "sixty-three million, six hundred sixty-four thousand, five hundred".