135791123549 has 2 divisors, whose sum is σ = 135791123550. Its totient is φ = 135791123548.

The previous prime is 135791123519. The next prime is 135791123609. The reversal of 135791123549 is 945321197531.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 135686879449 + 104244100 = 368357^2 + 10210^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135791123549 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 135791123497 and 135791123506.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135791123509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67895561774 + 67895561775.

It is an arithmetic number, because the mean of its divisors is an integer number (67895561775).

Almost surely, 2^135791123549 is an apocalyptic number.

It is an amenable number.

135791123549 is a deficient number, since it is larger than the sum of its proper divisors (1).

135791123549 is an equidigital number, since it uses as much as digits as its factorization.

135791123549 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1020600, while the sum is 50.

The spelling of 135791123549 in words is "one hundred thirty-five billion, seven hundred ninety-one million, one hundred twenty-three thousand, five hundred forty-nine".