135094615521 has 4 divisors (see below), whose sum is σ = 180126154032. Its totient is φ = 90063077012.

The previous prime is 135094615507. The next prime is 135094615553. The reversal of 135094615521 is 125516490531.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135094615521 is a prime.

It is not an unprimeable number, because it can be changed into a prime (135094615571) 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, 22515769251 + ... + 22515769256.

It is an arithmetic number, because the mean of its divisors is an integer number (45031538508).

Almost surely, 2^135094615521 is an apocalyptic number.

It is an amenable number.

135094615521 is a deficient number, since it is larger than the sum of its proper divisors (45031538511).

135094615521 is an equidigital number, since it uses as much as digits as its factorization.

135094615521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45031538510.

The product of its (nonzero) digits is 162000, while the sum is 42.

The spelling of 135094615521 in words is "one hundred thirty-five billion, ninety-four million, six hundred fifteen thousand, five hundred twenty-one".