640527570171 has 12 divisors (see below), whose sum is σ = 979630401672. Its totient is φ = 401899651776.

The previous prime is 640527570169. The next prime is 640527570217. The reversal of 640527570171 is 171075725046.

640527570171 is a `hidden beast` number, since 6 + 4 + 0 + 5 + 2 + 7 + 570 + 1 + 71 = 666.

640527570171 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 640527570171 - 2¹ = 640527570169 is a prime.

It is not an unprimeable number, because it can be changed into a prime (640527570271) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2093227201 + ... + 2093227506.

It is an arithmetic number, because the mean of its divisors is an integer number (81635866806).

Almost surely, 2^640527570171 is an apocalyptic number.

640527570171 is a deficient number, since it is larger than the sum of its proper divisors (339102831501).

640527570171 is a wasteful number, since it uses less digits than its factorization.

640527570171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4186454730 (or 4186454727 counting only the distinct ones).

The product of its (nonzero) digits is 411600, while the sum is 45.

The spelling of 640527570171 in words is "six hundred forty billion, five hundred twenty-seven million, five hundred seventy thousand, one hundred seventy-one".