64889475 has 36 divisors (see below), whose sum is σ = 124806744. Its totient is φ = 29662080.

The previous prime is 64889471. The next prime is 64889477. The reversal of 64889475 is 57498846.

64889475 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 64889475 - 2² = 64889471 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64889471) 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 35 ways as a sum of consecutive naturals, for example, 5154 + ... + 12503.

It is an arithmetic number, because the mean of its divisors is an integer number (3466854).

Almost surely, 2^64889475 is an apocalyptic number.

64889475 is a deficient number, since it is larger than the sum of its proper divisors (59917269).

64889475 is a wasteful number, since it uses less digits than its factorization.

64889475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17684 (or 17672 counting only the distinct ones).

The product of its digits is 1935360, while the sum is 51.

The square root of 64889475 is about 8055.4003624898. The cubic root of 64889475 is about 401.8445538943.

The spelling of 64889475 in words is "sixty-four million, eight hundred eighty-nine thousand, four hundred seventy-five".