135611661520025 has 48 divisors (see below), whose sum is σ = 179439640544640. Its totient is φ = 101368063526400.

The previous prime is 135611661519979. The next prime is 135611661520031. The reversal of 135611661520025 is 520025166116531.

It is not a de Polignac number, because 135611661520025 - 2²² = 135611657325721 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1648512395 + ... + 1648594655.

It is an arithmetic number, because the mean of its divisors is an integer number (3738325844680).

Almost surely, 2^{135611661520025} is an apocalyptic number.

It is an amenable number.

135611661520025 is a deficient number, since it is larger than the sum of its proper divisors (43827979024615).

135611661520025 is a wasteful number, since it uses less digits than its factorization.

135611661520025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129906 (or 129901 counting only the distinct ones).

The product of its (nonzero) digits is 324000, while the sum is 44.

The spelling of 135611661520025 in words is "one hundred thirty-five trillion, six hundred eleven billion, six hundred sixty-one million, five hundred twenty thousand, twenty-five".