135775212077 has 4 divisors (see below), whose sum is σ = 143761989276. Its totient is φ = 127788434880.

The previous prime is 135775212059. The next prime is 135775212091. The reversal of 135775212077 is 770212577531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 770212577531 = 163 ⋅4725230537.

It can be written as a sum of positive squares in 2 ways, for example, as 114170327881 + 21604884196 = 337891^2 + 146986^2 .

It is a cyclic number.

It is not a de Polignac number, because 135775212077 - 2¹⁶ = 135775146541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135775212877) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3993388574 + ... + 3993388607.

It is an arithmetic number, because the mean of its divisors is an integer number (35940497319).

Almost surely, 2^135775212077 is an apocalyptic number.

135775212077 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

135775212077 is a deficient number, since it is larger than the sum of its proper divisors (7986777199).

135775212077 is an equidigital number, since it uses as much as digits as its factorization.

135775212077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7986777198.

The product of its (nonzero) digits is 720300, while the sum is 47.

The spelling of 135775212077 in words is "one hundred thirty-five billion, seven hundred seventy-five million, two hundred twelve thousand, seventy-seven".