64520871 has 8 divisors (see below), whose sum is σ = 86160624. Its totient is φ = 42947520.

The previous prime is 64520867. The next prime is 64520873. The reversal of 64520871 is 17802546.

64520871 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 64520871 - 2² = 64520867 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64520873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14286 + ... + 18251.

It is an arithmetic number, because the mean of its divisors is an integer number (10770078).

Almost surely, 2^64520871 is an apocalyptic number.

64520871 is a deficient number, since it is larger than the sum of its proper divisors (21639753).

64520871 is a wasteful number, since it uses less digits than its factorization.

64520871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33201.

The product of its (nonzero) digits is 13440, while the sum is 33.

The square root of 64520871 is about 8032.4884687125. The cubic root of 64520871 is about 401.0822172904.

The spelling of 64520871 in words is "sixty-four million, five hundred twenty thousand, eight hundred seventy-one".