64320571 has 8 divisors (see below), whose sum is σ = 77833440. Its totient is φ = 51888768.

The previous prime is 64320563. The next prime is 64320577. The reversal of 64320571 is 17502346.

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 64320571 - 2³ = 64320563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64320577) 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, 270136 + ... + 270373.

It is an arithmetic number, because the mean of its divisors is an integer number (9729180).

Almost surely, 2^64320571 is an apocalyptic number.

64320571 is a deficient number, since it is larger than the sum of its proper divisors (13512869).

64320571 is a wasteful number, since it uses less digits than its factorization.

64320571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 540533.

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 64320571 is about 8020.0106608408. The cubic root of 64320571 is about 400.6667442627. Note that the first 3 decimals are identical.

The spelling of 64320571 in words is "sixty-four million, three hundred twenty thousand, five hundred seventy-one".