64361765 has 8 divisors (see below), whose sum is σ = 83175288. Its totient is φ = 47528640.

The previous prime is 64361729. The next prime is 64361783. The reversal of 64361765 is 56716346.

It is a happy number.

64361765 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 11115556 + 53246209 = 3334^2 + 7297^2 .

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

It is not a de Polignac number, because 64361765 - 2⁸ = 64361509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 495026 + ... + 495155.

It is an arithmetic number, because the mean of its divisors is an integer number (10396911).

Almost surely, 2^64361765 is an apocalyptic number.

64361765 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

64361765 is a deficient number, since it is larger than the sum of its proper divisors (18813523).

64361765 is a wasteful number, since it uses less digits than its factorization.

64361765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 990199.

The product of its digits is 90720, while the sum is 38.

The square root of 64361765 is about 8022.5784508473. The cubic root of 64361765 is about 400.7522614532.

The spelling of 64361765 in words is "sixty-four million, three hundred sixty-one thousand, seven hundred sixty-five".