9640558871 has 2 divisors, whose sum is σ = 9640558872. Its totient is φ = 9640558870.

The previous prime is 9640558847. The next prime is 9640558897. The reversal of 9640558871 is 1788550469.

It is a weak prime.

It is an emirp because it is prime and its reverse (1788550469) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9640558871 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9640558801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4820279435 + 4820279436.

It is an arithmetic number, because the mean of its divisors is an integer number (4820279436).

Almost surely, 2^9640558871 is an apocalyptic number.

9640558871 is a deficient number, since it is larger than the sum of its proper divisors (1).

9640558871 is an equidigital number, since it uses as much as digits as its factorization.

9640558871 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2419200, while the sum is 53.

The square root of 9640558871 is about 98186.3476813350. The cubic root of 9640558871 is about 2128.3060047602.

The spelling of 9640558871 in words is "nine billion, six hundred forty million, five hundred fifty-eight thousand, eight hundred seventy-one".