135896775517 has 4 divisors (see below), whose sum is σ = 135947241180. Its totient is φ = 135846309856.

The previous prime is 135896775491. The next prime is 135896775527. The reversal of 135896775517 is 715577698531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 715577698531 = 809 ⋅884521259.

It can be written as a sum of positive squares in 2 ways, for example, as 98914024036 + 36982751481 = 314506^2 + 192309^2 .

It is a cyclic number.

It is not a de Polignac number, because 135896775517 - 2⁷ = 135896775389 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 (135896775527) 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, 25228792 + ... + 25234177.

It is an arithmetic number, because the mean of its divisors is an integer number (33986810295).

Almost surely, 2^135896775517 is an apocalyptic number.

It is an amenable number.

135896775517 is a deficient number, since it is larger than the sum of its proper divisors (50465663).

135896775517 is an equidigital number, since it uses as much as digits as its factorization.

135896775517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50465662.

The product of its digits is 55566000, while the sum is 64.

The spelling of 135896775517 in words is "one hundred thirty-five billion, eight hundred ninety-six million, seven hundred seventy-five thousand, five hundred seventeen".