64520533 has 8 divisors (see below), whose sum is σ = 80441280. Its totient is φ = 50275680.

The previous prime is 64520509. The next prime is 64520537. The reversal of 64520533 is 33502546.

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

It is not a de Polignac number, because 64520533 - 2⁵ = 64520501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64520537) 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, 418888 + ... + 419041.

It is an arithmetic number, because the mean of its divisors is an integer number (10055160).

Almost surely, 2^64520533 is an apocalyptic number.

It is an amenable number.

64520533 is a deficient number, since it is larger than the sum of its proper divisors (15920747).

64520533 is a wasteful number, since it uses less digits than its factorization.

64520533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 837947.

The product of its (nonzero) digits is 10800, while the sum is 28.

The square root of 64520533 is about 8032.4674291279. The cubic root of 64520533 is about 401.0815169174.

The spelling of 64520533 in words is "sixty-four million, five hundred twenty thousand, five hundred thirty-three".