64189512 has 24 divisors (see below), whose sum is σ = 173846790. Its totient is φ = 21396480.

The previous prime is 64189493. The next prime is 64189513. The reversal of 64189512 is 21598146.

64189512 is a `hidden beast` number, since 64 + 1 + 89 + 512 = 666.

64189512 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 38118276 + 26071236 = 6174^2 + 5106^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (64189513) 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 5 ways as a sum of consecutive naturals, for example, 445689 + ... + 445832.

Almost surely, 2^64189512 is an apocalyptic number.

It is an amenable number.

64189512 is an abundant number, since it is smaller than the sum of its proper divisors (109657278).

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

64189512 is a wasteful number, since it uses less digits than its factorization.

64189512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 891533 (or 891526 counting only the distinct ones).

The product of its digits is 17280, while the sum is 36.

The square root of 64189512 is about 8011.8357446967. The cubic root of 64189512 is about 400.3944276060.

The spelling of 64189512 in words is "sixty-four million, one hundred eighty-nine thousand, five hundred twelve".