65217110505157 has 4 divisors (see below), whose sum is σ = 70233811313260. Its totient is φ = 60200409697056.

The previous prime is 65217110505143. The next prime is 65217110505221. The reversal of 65217110505157 is 75150501171256.

65217110505157 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 25370704120356 + 39846406384801 = 5036934^2 + 6312401^2 .

It is a cyclic number.

It is not a de Polignac number, because 65217110505157 - 2¹⁵ = 65217110472389 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 (65217110505257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2508350404032 + ... + 2508350404057.

It is an arithmetic number, because the mean of its divisors is an integer number (17558452828315).

Almost surely, 2^{65217110505157} is an apocalyptic number.

It is an amenable number.

65217110505157 is a deficient number, since it is larger than the sum of its proper divisors (5016700808103).

65217110505157 is a wasteful number, since it uses less digits than its factorization.

65217110505157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5016700808102.

The product of its (nonzero) digits is 367500, while the sum is 46.

The spelling of 65217110505157 in words is "sixty-five trillion, two hundred seventeen billion, one hundred ten million, five hundred five thousand, one hundred fifty-seven".