135404445637 has 2 divisors, whose sum is σ = 135404445638. Its totient is φ = 135404445636.

The previous prime is 135404445523. The next prime is 135404445679. The reversal of 135404445637 is 736544404531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 129489143716 + 5915301921 = 359846^2 + 76911^2 .

It is a cyclic number.

It is not a de Polignac number, because 135404445637 - 2¹¹ = 135404443589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135404445697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67702222818 + 67702222819.

It is an arithmetic number, because the mean of its divisors is an integer number (67702222819).

Almost surely, 2^135404445637 is an apocalyptic number.

It is an amenable number.

135404445637 is a deficient number, since it is larger than the sum of its proper divisors (1).

135404445637 is an equidigital number, since it uses as much as digits as its factorization.

135404445637 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2419200, while the sum is 46.

The spelling of 135404445637 in words is "one hundred thirty-five billion, four hundred four million, four hundred forty-five thousand, six hundred thirty-seven".