135827857909 has 2 divisors, whose sum is σ = 135827857910. Its totient is φ = 135827857908.

The previous prime is 135827857853. The next prime is 135827857937. The reversal of 135827857909 is 909758728531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 130594058884 + 5233799025 = 361378^2 + 72345^2 .

It is a cyclic number.

It is not a de Polignac number, because 135827857909 - 2²³ = 135819469301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135827857999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67913928954 + 67913928955.

It is an arithmetic number, because the mean of its divisors is an integer number (67913928955).

Almost surely, 2^135827857909 is an apocalyptic number.

It is an amenable number.

135827857909 is a deficient number, since it is larger than the sum of its proper divisors (1).

135827857909 is an equidigital number, since it uses as much as digits as its factorization.

135827857909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38102400, while the sum is 64.

The spelling of 135827857909 in words is "one hundred thirty-five billion, eight hundred twenty-seven million, eight hundred fifty-seven thousand, nine hundred nine".