135756161 has 12 divisors (see below), whose sum is σ = 142920960. Its totient is φ = 128815440.

The previous prime is 135756151. The next prime is 135756167. The reversal of 135756161 is 161657531.

It is a de Polignac number, because none of the positive numbers 2^k-135756161 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135756167) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 86300 + ... + 87858.

It is an arithmetic number, because the mean of its divisors is an integer number (11910080).

Almost surely, 2^135756161 is an apocalyptic number.

It is an amenable number.

135756161 is a deficient number, since it is larger than the sum of its proper divisors (7164799).

135756161 is an equidigital number, since it uses as much as digits as its factorization.

135756161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1696 (or 1643 counting only the distinct ones).

The product of its digits is 18900, while the sum is 35.

The square root of 135756161 is about 11651.4445885478. Note that the first 3 decimals coincide. The cubic root of 135756161 is about 513.9487917513.

The spelling of 135756161 in words is "one hundred thirty-five million, seven hundred fifty-six thousand, one hundred sixty-one".