65061680121 has 12 divisors (see below), whose sum is σ = 94124602260. Its totient is φ = 43306782720.

The previous prime is 65061680087. The next prime is 65061680161. The reversal of 65061680121 is 12108616056.

It can be written as a sum of positive squares in 2 ways, for example, as 24312605625 + 40749074496 = 155925^2 + 201864^2 .

It is not a de Polignac number, because 65061680121 - 2⁹ = 65061679609 is a prime.

It is not an unprimeable number, because it can be changed into a prime (65061680161) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5633136 + ... + 5644673.

It is an arithmetic number, because the mean of its divisors is an integer number (7843716855).

Almost surely, 2^65061680121 is an apocalyptic number.

It is an amenable number.

65061680121 is a deficient number, since it is larger than the sum of its proper divisors (29062922139).

65061680121 is a wasteful number, since it uses less digits than its factorization.

65061680121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11278456 (or 11278453 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The spelling of 65061680121 in words is "sixty-five billion, sixty-one million, six hundred eighty thousand, one hundred twenty-one".