64941565 has 8 divisors (see below), whose sum is σ = 83924568. Its totient is φ = 47956800.

The previous prime is 64941557. The next prime is 64941599. The reversal of 64941565 is 56514946.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 10201 + 64931364 = 101^2 + 8058^2 .

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

It is not a de Polignac number, because 64941565 - 2³ = 64941557 is a prime.

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, 499486 + ... + 499615.

It is an arithmetic number, because the mean of its divisors is an integer number (10490571).

Almost surely, 2^64941565 is an apocalyptic number.

64941565 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

64941565 is a deficient number, since it is larger than the sum of its proper divisors (18983003).

64941565 is a wasteful number, since it uses less digits than its factorization.

64941565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 999119.

The product of its digits is 129600, while the sum is 40.

The square root of 64941565 is about 8058.6329485838. The cubic root of 64941565 is about 401.9520519861.

The spelling of 64941565 in words is "sixty-four million, nine hundred forty-one thousand, five hundred sixty-five".