128163081587 has 2 divisors, whose sum is σ = 128163081588. Its totient is φ = 128163081586.

The previous prime is 128163081569. The next prime is 128163081623. The reversal of 128163081587 is 785180361821.

It is a weak prime.

It is an emirp because it is prime and its reverse (785180361821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 128163081587 - 2³² = 123868114291 is a prime.

It is not a weakly prime, because it can be changed into another prime (128163081287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64081540793 + 64081540794.

It is an arithmetic number, because the mean of its divisors is an integer number (64081540794).

Almost surely, 2^128163081587 is an apocalyptic number.

128163081587 is a deficient number, since it is larger than the sum of its proper divisors (1).

128163081587 is an equidigital number, since it uses as much as digits as its factorization.

128163081587 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 645120, while the sum is 50.

The spelling of 128163081587 in words is "one hundred twenty-eight billion, one hundred sixty-three million, eighty-one thousand, five hundred eighty-seven".