64306565 has 4 divisors (see below), whose sum is σ = 77167884. Its totient is φ = 51445248.

The previous prime is 64306559. The next prime is 64306607. The reversal of 64306565 is 56560346.

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 25381444 + 38925121 = 5038^2 + 6239^2 .

It is a cyclic number.

It is not a de Polignac number, because 64306565 - 2⁴ = 64306549 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 3 ways as a sum of consecutive naturals, for example, 6430652 + ... + 6430661.

It is an arithmetic number, because the mean of its divisors is an integer number (19291971).

Almost surely, 2^64306565 is an apocalyptic number.

It is an amenable number.

64306565 is a deficient number, since it is larger than the sum of its proper divisors (12861319).

64306565 is a wasteful number, since it uses less digits than its factorization.

64306565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12861318.

The product of its (nonzero) digits is 64800, while the sum is 35.

The square root of 64306565 is about 8019.1374224414. The cubic root of 64306565 is about 400.6376600174.

The spelling of 64306565 in words is "sixty-four million, three hundred six thousand, five hundred sixty-five".