21160466160517 has 2 divisors, whose sum is σ = 21160466160518. Its totient is φ = 21160466160516.

The previous prime is 21160466160511. The next prime is 21160466160577. The reversal of 21160466160517 is 71506166406112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15474082231521 + 5686383928996 = 3933711^2 + 2384614^2 .

It is a cyclic number.

It is not a de Polignac number, because 21160466160517 - 2³⁵ = 21126106422149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21160466160511) 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, 10580233080258 + 10580233080259.

It is an arithmetic number, because the mean of its divisors is an integer number (10580233080259).

Almost surely, 2^{21160466160517} is an apocalyptic number.

It is an amenable number.

21160466160517 is a deficient number, since it is larger than the sum of its proper divisors (1).

21160466160517 is an equidigital number, since it uses as much as digits as its factorization.

21160466160517 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 362880, while the sum is 46.

The spelling of 21160466160517 in words is "twenty-one trillion, one hundred sixty billion, four hundred sixty-six million, one hundred sixty thousand, five hundred seventeen".