65135992517 has 8 divisors (see below), whose sum is σ = 66384409080. Its totient is φ = 63899409600.

The previous prime is 65135992511. The next prime is 65135992529. The reversal of 65135992517 is 71529953156.

It can be written as a sum of positive squares in 4 ways, for example, as 40358399236 + 24777593281 = 200894^2 + 157409^2 .

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 65135992517 - 2²⁸ = 64867557061 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65135992511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2947298 + ... + 2969315.

It is an arithmetic number, because the mean of its divisors is an integer number (8298051135).

Almost surely, 2^65135992517 is an apocalyptic number.

It is an amenable number.

65135992517 is a deficient number, since it is larger than the sum of its proper divisors (1248416563).

65135992517 is a wasteful number, since it uses less digits than its factorization.

65135992517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5916823.

The product of its digits is 2551500, while the sum is 53.

The spelling of 65135992517 in words is "sixty-five billion, one hundred thirty-five million, nine hundred ninety-two thousand, five hundred seventeen".