65161616056 has 8 divisors (see below), whose sum is σ = 122178030120. Its totient is φ = 32580808024.

The previous prime is 65161616053. The next prime is 65161616071. The reversal of 65161616056 is 65061616156.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65161616053) 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 as a sum of consecutive naturals, namely, 4072600996 + ... + 4072601011.

It is an arithmetic number, because the mean of its divisors is an integer number (15272253765).

Almost surely, 2^65161616056 is an apocalyptic number.

It is an amenable number.

65161616056 is a deficient number, since it is larger than the sum of its proper divisors (57016414064).

65161616056 is a wasteful number, since it uses less digits than its factorization.

65161616056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8145202013 (or 8145202009 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 43.

The spelling of 65161616056 in words is "sixty-five billion, one hundred sixty-one million, six hundred sixteen thousand, fifty-six".