64133571065 has 4 divisors (see below), whose sum is σ = 76960285284. Its totient is φ = 51306856848.

The previous prime is 64133570971. The next prime is 64133571067. The reversal of 64133571065 is 56017533146.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 43096099216 + 21037471849 = 207596^2 + 145043^2 .

It is a cyclic number.

It is not a de Polignac number, because 64133571065 - 2¹⁰ = 64133570041 is a prime.

It is a super-2 number, since 2×64133571065² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (64133571067) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6413357102 + ... + 6413357111.

It is an arithmetic number, because the mean of its divisors is an integer number (19240071321).

Almost surely, 2^64133571065 is an apocalyptic number.

It is an amenable number.

64133571065 is a deficient number, since it is larger than the sum of its proper divisors (12826714219).

64133571065 is a wasteful number, since it uses less digits than its factorization.

64133571065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12826714218.

The product of its (nonzero) digits is 226800, while the sum is 41.

The spelling of 64133571065 in words is "sixty-four billion, one hundred thirty-three million, five hundred seventy-one thousand, sixty-five".