64447465 has 4 divisors (see below), whose sum is σ = 77336964. Its totient is φ = 51557968.

The previous prime is 64447463. The next prime is 64447469. The reversal of 64447465 is 56474446.

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 30958096 + 33489369 = 5564^2 + 5787^2 .

It is a cyclic number.

It is not a de Polignac number, because 64447465 - 2¹ = 64447463 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64447463) by changing a digit.

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, 6444742 + ... + 6444751.

It is an arithmetic number, because the mean of its divisors is an integer number (19334241).

Almost surely, 2^64447465 is an apocalyptic number.

It is an amenable number.

64447465 is a deficient number, since it is larger than the sum of its proper divisors (12889499).

64447465 is a wasteful number, since it uses less digits than its factorization.

64447465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12889498.

The product of its digits is 322560, while the sum is 40.

The square root of 64447465 is about 8027.9178496046. The cubic root of 64447465 is about 400.9300545702.

The spelling of 64447465 in words is "sixty-four million, four hundred forty-seven thousand, four hundred sixty-five".