640560060271 has 2 divisors, whose sum is σ = 640560060272. Its totient is φ = 640560060270.

The previous prime is 640560060229. The next prime is 640560060337. The reversal of 640560060271 is 172060065046.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 640560060271 - 2¹³ = 640560052079 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 640560060271.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (640560060071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320280030135 + 320280030136.

It is an arithmetic number, because the mean of its divisors is an integer number (320280030136).

Almost surely, 2^640560060271 is an apocalyptic number.

640560060271 is a deficient number, since it is larger than the sum of its proper divisors (1).

640560060271 is an equidigital number, since it uses as much as digits as its factorization.

640560060271 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60480, while the sum is 37.

The spelling of 640560060271 in words is "six hundred forty billion, five hundred sixty million, sixty thousand, two hundred seventy-one".