128518143539 has 2 divisors, whose sum is σ = 128518143540. Its totient is φ = 128518143538.

The previous prime is 128518143527. The next prime is 128518143541. The reversal of 128518143539 is 935341815821.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 128518143539 - 2³² = 124223176243 is a prime.

It is a super-2 number, since 2×128518143539² (a number of 23 digits) contains 22 as substring.

Together with 128518143541, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (128518143739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64259071769 + 64259071770.

It is an arithmetic number, because the mean of its divisors is an integer number (64259071770).

Almost surely, 2^128518143539 is an apocalyptic number.

128518143539 is a deficient number, since it is larger than the sum of its proper divisors (1).

128518143539 is an equidigital number, since it uses as much as digits as its factorization.

128518143539 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1036800, while the sum is 50.

The spelling of 128518143539 in words is "one hundred twenty-eight billion, five hundred eighteen million, one hundred forty-three thousand, five hundred thirty-nine".