135775212877 has 2 divisors, whose sum is σ = 135775212878. Its totient is φ = 135775212876.

The previous prime is 135775212851. The next prime is 135775212901. The reversal of 135775212877 is 778212577531.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 131893175241 + 3882037636 = 363171^2 + 62306^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135775212877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135775512877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67887606438 + 67887606439.

It is an arithmetic number, because the mean of its divisors is an integer number (67887606439).

Almost surely, 2^135775212877 is an apocalyptic number.

It is an amenable number.

135775212877 is a deficient number, since it is larger than the sum of its proper divisors (1).

135775212877 is an equidigital number, since it uses as much as digits as its factorization.

135775212877 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5762400, while the sum is 55.

The spelling of 135775212877 in words is "one hundred thirty-five billion, seven hundred seventy-five million, two hundred twelve thousand, eight hundred seventy-seven".