64744465 has 4 divisors (see below), whose sum is σ = 77693364. Its totient is φ = 51795568.

The previous prime is 64744411. The next prime is 64744489. The reversal of 64744465 is 56444746.

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 8809024 + 55935441 = 2968^2 + 7479^2 .

It is a cyclic number.

It is not a de Polignac number, because 64744465 - 2⁹ = 64743953 is a prime.

It is a Duffinian 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, 6474442 + ... + 6474451.

It is an arithmetic number, because the mean of its divisors is an integer number (19423341).

Almost surely, 2^64744465 is an apocalyptic number.

It is an amenable number.

64744465 is a deficient number, since it is larger than the sum of its proper divisors (12948899).

64744465 is a wasteful number, since it uses less digits than its factorization.

64744465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12948898.

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

The square root of 64744465 is about 8046.3945341998. The cubic root of 64744465 is about 401.5449935542.

The spelling of 64744465 in words is "sixty-four million, seven hundred forty-four thousand, four hundred sixty-five".