64465989 has 32 divisors (see below), whose sum is σ = 104509440. Its totient is φ = 34505472.

The previous prime is 64465969. The next prime is 64466021. The reversal of 64465989 is 98956446.

It is not a de Polignac number, because 64465989 - 2⁸ = 64465733 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64465939) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 127912 + ... + 128414.

It is an arithmetic number, because the mean of its divisors is an integer number (3265920).

Almost surely, 2^64465989 is an apocalyptic number.

It is an amenable number.

64465989 is a deficient number, since it is larger than the sum of its proper divisors (40043451).

64465989 is a wasteful number, since it uses less digits than its factorization.

64465989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 889.

The product of its digits is 1866240, while the sum is 51.

The square root of 64465989 is about 8029.0714905274. The cubic root of 64465989 is about 400.9684637193.

The spelling of 64465989 in words is "sixty-four million, four hundred sixty-five thousand, nine hundred eighty-nine".