128631601129 has 2 divisors, whose sum is σ = 128631601130. Its totient is φ = 128631601128.

The previous prime is 128631601117. The next prime is 128631601181. The reversal of 128631601129 is 921106136821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 125117838400 + 3513762729 = 353720^2 + 59277^2 .

It is a cyclic number.

It is not a de Polignac number, because 128631601129 - 2¹³ = 128631592937 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 128631601091 and 128631601100.

It is not a weakly prime, because it can be changed into another prime (128631601829) 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, 64315800564 + 64315800565.

It is an arithmetic number, because the mean of its divisors is an integer number (64315800565).

Almost surely, 2^128631601129 is an apocalyptic number.

It is an amenable number.

128631601129 is a deficient number, since it is larger than the sum of its proper divisors (1).

128631601129 is an equidigital number, since it uses as much as digits as its factorization.

128631601129 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 40.

The spelling of 128631601129 in words is "one hundred twenty-eight billion, six hundred thirty-one million, six hundred one thousand, one hundred twenty-nine".