135741521443571 has 4 divisors (see below), whose sum is σ = 135744992511432. Its totient is φ = 135738050375712.

The previous prime is 135741521443531. The next prime is 135741521443609. The reversal of 135741521443571 is 175344125147531.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135741521443571 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135741521443531) 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, 1735475270 + ... + 1735553483.

It is an arithmetic number, because the mean of its divisors is an integer number (33936248127858).

Almost surely, 2^{135741521443571} is an apocalyptic number.

135741521443571 is a deficient number, since it is larger than the sum of its proper divisors (3471067861).

135741521443571 is an equidigital number, since it uses as much as digits as its factorization.

135741521443571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3471067860.

The product of its digits is 7056000, while the sum is 53.

The spelling of 135741521443571 in words is "one hundred thirty-five trillion, seven hundred forty-one billion, five hundred twenty-one million, four hundred forty-three thousand, five hundred seventy-one".