640560060071 has 2 divisors, whose sum is σ = 640560060072. Its totient is φ = 640560060070.

The previous prime is 640560060043. The next prime is 640560060083. The reversal of 640560060071 is 170060065046.

640560060071 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-640560060071 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (640560060271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320280030035 + 320280030036.

It is an arithmetic number, because the mean of its divisors is an integer number (320280030036).

Almost surely, 2^640560060071 is an apocalyptic number.

640560060071 is a deficient number, since it is larger than the sum of its proper divisors (1).

640560060071 is an equidigital number, since it uses as much as digits as its factorization.

640560060071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30240, while the sum is 35.

The spelling of 640560060071 in words is "six hundred forty billion, five hundred sixty million, sixty thousand, seventy-one".