64911265 has 4 divisors (see below), whose sum is σ = 77893524. Its totient is φ = 51929008.

The previous prime is 64911257. The next prime is 64911271. The reversal of 64911265 is 56211946.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8225424 + 56685841 = 2868^2 + 7529^2 .

It is a cyclic number.

It is not a de Polignac number, because 64911265 - 2³ = 64911257 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 64911265.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6491122 + ... + 6491131.

It is an arithmetic number, because the mean of its divisors is an integer number (19473381).

Almost surely, 2^64911265 is an apocalyptic number.

It is an amenable number.

64911265 is a deficient number, since it is larger than the sum of its proper divisors (12982259).

64911265 is a wasteful number, since it uses less digits than its factorization.

64911265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12982258.

The product of its digits is 12960, while the sum is 34.

The square root of 64911265 is about 8056.7527577803. The cubic root of 64911265 is about 401.8895288967.

The spelling of 64911265 in words is "sixty-four million, nine hundred eleven thousand, two hundred sixty-five".