128247882517 has 2 divisors, whose sum is σ = 128247882518. Its totient is φ = 128247882516.

The previous prime is 128247882467. The next prime is 128247882527. The reversal of 128247882517 is 715288742821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 83286496836 + 44961385681 = 288594^2 + 212041^2 .

It is an emirp because it is prime and its reverse (715288742821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 128247882517 - 2¹⁵ = 128247849749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128247882527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64123941258 + 64123941259.

It is an arithmetic number, because the mean of its divisors is an integer number (64123941259).

Almost surely, 2^128247882517 is an apocalyptic number.

It is an amenable number.

128247882517 is a deficient number, since it is larger than the sum of its proper divisors (1).

128247882517 is an equidigital number, since it uses as much as digits as its factorization.

128247882517 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4014080, while the sum is 55.

The spelling of 128247882517 in words is "one hundred twenty-eight billion, two hundred forty-seven million, eight hundred eighty-two thousand, five hundred seventeen".