64563500 has 24 divisors (see below), whose sum is σ = 141007776. Its totient is φ = 25825200.

The previous prime is 64563469. The next prime is 64563509. The reversal of 64563500 is 536546.

64563500 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (64563509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64064 + ... + 65063.

It is an arithmetic number, because the mean of its divisors is an integer number (5875324).

Almost surely, 2^64563500 is an apocalyptic number.

It is an amenable number.

64563500 is an abundant number, since it is smaller than the sum of its proper divisors (76444276).

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

64563500 is a wasteful number, since it uses less digits than its factorization.

64563500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129146 (or 129134 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 29.

The square root of 64563500 is about 8035.1415668923. The cubic root of 64563500 is about 401.1705296430.

The spelling of 64563500 in words is "sixty-four million, five hundred sixty-three thousand, five hundred".