64391171 has 16 divisors (see below), whose sum is σ = 73731840. Its totient is φ = 55740960.

The previous prime is 64391149. The next prime is 64391179. The reversal of 64391171 is 17119346.

It is a cyclic number.

It is not a de Polignac number, because 64391171 - 2¹⁴ = 64374787 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64391179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24176 + ... + 26706.

It is an arithmetic number, because the mean of its divisors is an integer number (4608240).

Almost surely, 2^64391171 is an apocalyptic number.

64391171 is a deficient number, since it is larger than the sum of its proper divisors (9340669).

64391171 is a wasteful number, since it uses less digits than its factorization.

64391171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2666.

The product of its digits is 4536, while the sum is 32.

The square root of 64391171 is about 8024.4109441130. The cubic root of 64391171 is about 400.8132848819.

The spelling of 64391171 in words is "sixty-four million, three hundred ninety-one thousand, one hundred seventy-one".