128806045637 has 2 divisors, whose sum is σ = 128806045638. Its totient is φ = 128806045636.

The previous prime is 128806045603. The next prime is 128806045651. The reversal of 128806045637 is 736540608821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 117603728356 + 11202317281 = 342934^2 + 105841^2 .

It is a cyclic number.

It is not a de Polignac number, because 128806045637 - 2¹⁶ = 128805980101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128806045237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64403022818 + 64403022819.

It is an arithmetic number, because the mean of its divisors is an integer number (64403022819).

Almost surely, 2^128806045637 is an apocalyptic number.

It is an amenable number.

128806045637 is a deficient number, since it is larger than the sum of its proper divisors (1).

128806045637 is an equidigital number, since it uses as much as digits as its factorization.

128806045637 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1935360, while the sum is 50.

The spelling of 128806045637 in words is "one hundred twenty-eight billion, eight hundred six million, forty-five thousand, six hundred thirty-seven".