20116713552161 has 2 divisors, whose sum is σ = 20116713552162. Its totient is φ = 20116713552160.

The previous prime is 20116713552071. The next prime is 20116713552191. The reversal of 20116713552161 is 16125531761102.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16383316712161 + 3733396840000 = 4047631^2 + 1932200^2 .

It is a cyclic number.

It is not a de Polignac number, because 20116713552161 - 2²⁶ = 20116646443297 is a prime.

It is not a weakly prime, because it can be changed into another prime (20116713552191) 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 as a sum of consecutive naturals, namely, 10058356776080 + 10058356776081.

It is an arithmetic number, because the mean of its divisors is an integer number (10058356776081).

Almost surely, 2^{20116713552161} is an apocalyptic number.

It is an amenable number.

20116713552161 is a deficient number, since it is larger than the sum of its proper divisors (1).

20116713552161 is an equidigital number, since it uses as much as digits as its factorization.

20116713552161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 75600, while the sum is 41.

The spelling of 20116713552161 in words is "twenty trillion, one hundred sixteen billion, seven hundred thirteen million, five hundred fifty-two thousand, one hundred sixty-one".