135515025665 has 8 divisors (see below), whose sum is σ = 162621124200. Its totient is φ = 108409958272.

The previous prime is 135515025647. The next prime is 135515025673. The reversal of 135515025665 is 566520515531.

It can be written as a sum of positive squares in 4 ways, for example, as 53393807041 + 82121218624 = 231071^2 + 286568^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 135515025665 - 2⁶ = 135515025601 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69011 + ... + 525159.

It is an arithmetic number, because the mean of its divisors is an integer number (20327640525).

Almost surely, 2^135515025665 is an apocalyptic number.

It is an amenable number.

135515025665 is a deficient number, since it is larger than the sum of its proper divisors (27106098535).

135515025665 is an equidigital number, since it uses as much as digits as its factorization.

135515025665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 515571.

The product of its (nonzero) digits is 675000, while the sum is 44.

The spelling of 135515025665 in words is "one hundred thirty-five billion, five hundred fifteen million, twenty-five thousand, six hundred sixty-five".