64571117 has 16 divisors (see below), whose sum is σ = 74137392. Its totient is φ = 55710720.

The previous prime is 64571093. The next prime is 64571159. The reversal of 64571117 is 71117546.

It can be written as a sum of positive squares in 8 ways, for example, as 16532356 + 48038761 = 4066^2 + 6931^2 .

It is not a de Polignac number, because 64571117 - 2⁶ = 64571053 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 (64574117) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33767 + ... + 35627.

It is an arithmetic number, because the mean of its divisors is an integer number (4633587).

Almost surely, 2^64571117 is an apocalyptic number.

It is an amenable number.

64571117 is a deficient number, since it is larger than the sum of its proper divisors (9566275).

64571117 is a wasteful number, since it uses less digits than its factorization.

64571117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2048.

The product of its digits is 5880, while the sum is 32.

The square root of 64571117 is about 8035.6155333615. The cubic root of 64571117 is about 401.1863053045.

The spelling of 64571117 in words is "sixty-four million, five hundred seventy-one thousand, one hundred seventeen".