135205344377 has 4 divisors (see below), whose sum is σ = 135526497636. Its totient is φ = 134884191120.

The previous prime is 135205344361. The next prime is 135205344433. The reversal of 135205344377 is 773443502531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 773443502531 = 7 ⋅110491928933.

It can be written as a sum of positive squares in 2 ways, for example, as 240219001 + 134965125376 = 15499^2 + 367376^2 .

It is a cyclic number.

It is not a de Polignac number, because 135205344377 - 2⁴ = 135205344361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135205344317) 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, 160575998 + ... + 160576839.

It is an arithmetic number, because the mean of its divisors is an integer number (33881624409).

Almost surely, 2^135205344377 is an apocalyptic number.

It is an amenable number.

135205344377 is a deficient number, since it is larger than the sum of its proper divisors (321153259).

135205344377 is an equidigital number, since it uses as much as digits as its factorization.

135205344377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321153258.

The product of its (nonzero) digits is 1058400, while the sum is 44.

The spelling of 135205344377 in words is "one hundred thirty-five billion, two hundred five million, three hundred forty-four thousand, three hundred seventy-seven".