64533647 has 8 divisors (see below), whose sum is σ = 65387712. Its totient is φ = 63684000.

The previous prime is 64533641. The next prime is 64533659. The reversal of 64533647 is 74633546.

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

It is a cyclic number.

It is not a de Polignac number, because 64533647 - 2¹⁴ = 64517263 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 64533647.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64533641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36197 + ... + 37937.

It is an arithmetic number, because the mean of its divisors is an integer number (8173464).

Almost surely, 2^64533647 is an apocalyptic number.

64533647 is a deficient number, since it is larger than the sum of its proper divisors (854065).

64533647 is a wasteful number, since it uses less digits than its factorization.

64533647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2209.

The product of its digits is 181440, while the sum is 38.

The square root of 64533647 is about 8033.2836997084. The cubic root of 64533647 is about 401.1086887672.

The spelling of 64533647 in words is "sixty-four million, five hundred thirty-three thousand, six hundred forty-seven".