128018338531 has 2 divisors, whose sum is σ = 128018338532. Its totient is φ = 128018338530.

The previous prime is 128018338489. The next prime is 128018338579. The reversal of 128018338531 is 135833810821.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 128018338531 - 2¹⁵ = 128018305763 is a prime.

It is a super-2 number, since 2×128018338531² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (128018339531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64009169265 + 64009169266.

It is an arithmetic number, because the mean of its divisors is an integer number (64009169266).

Almost surely, 2^128018338531 is an apocalyptic number.

128018338531 is a deficient number, since it is larger than the sum of its proper divisors (1).

128018338531 is an equidigital number, since it uses as much as digits as its factorization.

128018338531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 138240, while the sum is 43.

The spelling of 128018338531 in words is "one hundred twenty-eight billion, eighteen million, three hundred thirty-eight thousand, five hundred thirty-one".