128450841517 has 2 divisors, whose sum is σ = 128450841518. Its totient is φ = 128450841516.

The previous prime is 128450841487. The next prime is 128450841551. The reversal of 128450841517 is 715148054821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 112157340201 + 16293501316 = 334899^2 + 127646^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128450841517 is a prime.

It is a super-2 number, since 2×128450841517² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128450845517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64225420758 + 64225420759.

It is an arithmetic number, because the mean of its divisors is an integer number (64225420759).

Almost surely, 2^128450841517 is an apocalyptic number.

It is an amenable number.

128450841517 is a deficient number, since it is larger than the sum of its proper divisors (1).

128450841517 is an equidigital number, since it uses as much as digits as its factorization.

128450841517 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 358400, while the sum is 46.

The spelling of 128450841517 in words is "one hundred twenty-eight billion, four hundred fifty million, eight hundred forty-one thousand, five hundred seventeen".