64864565 has 8 divisors (see below), whose sum is σ = 78207648. Its totient is φ = 51644880.

The previous prime is 64864549. The next prime is 64864573. The reversal of 64864565 is 56546846.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 64864565 - 2⁴ = 64864549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29687 + ... + 31796.

It is an arithmetic number, because the mean of its divisors is an integer number (9775956).

Almost surely, 2^64864565 is an apocalyptic number.

It is an amenable number.

64864565 is a deficient number, since it is larger than the sum of its proper divisors (13343083).

64864565 is a wasteful number, since it uses less digits than its factorization.

64864565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61699.

The product of its digits is 691200, while the sum is 44.

The square root of 64864565 is about 8053.8540463557. The cubic root of 64864565 is about 401.7931268126.

The spelling of 64864565 in words is "sixty-four million, eight hundred sixty-four thousand, five hundred sixty-five".