2160813274661 has 2 divisors, whose sum is σ = 2160813274662. Its totient is φ = 2160813274660.

The previous prime is 2160813274579. The next prime is 2160813274663. The reversal of 2160813274661 is 1664723180612.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1975939073761 + 184874200900 = 1405681^2 + 429970^2 .

It is a cyclic number.

It is not a de Polignac number, because 2160813274661 - 2²⁶ = 2160746165797 is a prime.

It is a super-2 number, since 2×2160813274661² (a number of 25 digits) contains 22 as substring.

Together with 2160813274663, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2160813274663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1080406637330 + 1080406637331.

It is an arithmetic number, because the mean of its divisors is an integer number (1080406637331).

Almost surely, 2^{2160813274661} is an apocalyptic number.

It is an amenable number.

2160813274661 is a deficient number, since it is larger than the sum of its proper divisors (1).

2160813274661 is an equidigital number, since it uses as much as digits as its factorization.

2160813274661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 580608, while the sum is 47.

The spelling of 2160813274661 in words is "two trillion, one hundred sixty billion, eight hundred thirteen million, two hundred seventy-four thousand, six hundred sixty-one".