2183897267561 has 2 divisors, whose sum is σ = 2183897267562. Its totient is φ = 2183897267560.

The previous prime is 2183897267527. The next prime is 2183897267581. The reversal of 2183897267561 is 1657627983812.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2074968225625 + 108929041936 = 1440475^2 + 330044^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2183897267561 is a prime.

It is not a weakly prime, because it can be changed into another prime (2183897267581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1091948633780 + 1091948633781.

It is an arithmetic number, because the mean of its divisors is an integer number (1091948633781).

Almost surely, 2^{2183897267561} is an apocalyptic number.

It is an amenable number.

2183897267561 is a deficient number, since it is larger than the sum of its proper divisors (1).

2183897267561 is an equidigital number, since it uses as much as digits as its factorization.

2183897267561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 60963840, while the sum is 65.

The spelling of 2183897267561 in words is "two trillion, one hundred eighty-three billion, eight hundred ninety-seven million, two hundred sixty-seven thousand, five hundred sixty-one".