2183897267581 has 2 divisors, whose sum is σ = 2183897267582. Its totient is φ = 2183897267580.

The previous prime is 2183897267561. The next prime is 2183897267609. The reversal of 2183897267581 is 1857627983812.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2085107120100 + 98790147481 = 1443990^2 + 314309^2 .

It is a cyclic number.

It is not a de Polignac number, because 2183897267581 - 2¹¹ = 2183897265533 is a prime.

It is a super-2 number, since 2×2183897267581² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2183897267561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1091948633790 + 1091948633791.

It is an arithmetic number, because the mean of its divisors is an integer number (1091948633791).

Almost surely, 2^{2183897267581} is an apocalyptic number.

It is an amenable number.

2183897267581 is a deficient number, since it is larger than the sum of its proper divisors (1).

2183897267581 is an equidigital number, since it uses as much as digits as its factorization.

2183897267581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 81285120, while the sum is 67.

The spelling of 2183897267581 in words is "two trillion, one hundred eighty-three billion, eight hundred ninety-seven million, two hundred sixty-seven thousand, five hundred eighty-one".