128269120831531 has 2 divisors, whose sum is σ = 128269120831532. Its totient is φ = 128269120831530.

The previous prime is 128269120831441. The next prime is 128269120831703. The reversal of 128269120831531 is 135138021962821.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 128269120831531 - 2¹⁷ = 128269120700459 is a prime.

It is a super-2 number, since 2×128269120831531² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (128269120801531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64134560415765 + 64134560415766.

It is an arithmetic number, because the mean of its divisors is an integer number (64134560415766).

Almost surely, 2^{128269120831531} is an apocalyptic number.

128269120831531 is a deficient number, since it is larger than the sum of its proper divisors (1).

128269120831531 is an equidigital number, since it uses as much as digits as its factorization.

128269120831531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1244160, while the sum is 52.

The spelling of 128269120831531 in words is "one hundred twenty-eight trillion, two hundred sixty-nine billion, one hundred twenty million, eight hundred thirty-one thousand, five hundred thirty-one".