65655565156161 has 12 divisors (see below), whose sum is σ = 95675071349988. Its totient is φ = 43383028303104.

The previous prime is 65655565156117. The next prime is 65655565156273. The reversal of 65655565156161 is 16165156555656.

65655565156161 is a `hidden beast` number, since 6 + 5 + 6 + 5 + 5 + 5 + 6 + 5 + 1 + 5 + 616 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 760940437761 + 64894624718400 = 872319^2 + 8055720^2 .

It is a de Polignac number, because none of the positive numbers 2^k-65655565156161 is a prime.

It is not an unprimeable number, because it can be changed into a prime (65655565154161) 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, 32279037900 + ... + 32279039933.

It is an arithmetic number, because the mean of its divisors is an integer number (7972922612499).

Almost surely, 2^{65655565156161} is an apocalyptic number.

It is an amenable number.

65655565156161 is a deficient number, since it is larger than the sum of its proper divisors (30019506193827).

65655565156161 is a wasteful number, since it uses less digits than its factorization.

65655565156161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64558077952 (or 64558077949 counting only the distinct ones).

The product of its digits is 121500000, while the sum is 63.

The spelling of 65655565156161 in words is "sixty-five trillion, six hundred fifty-five billion, five hundred sixty-five million, one hundred fifty-six thousand, one hundred sixty-one".