2161836594899 has 2 divisors, whose sum is σ = 2161836594900. Its totient is φ = 2161836594898.

The previous prime is 2161836594877. The next prime is 2161836594901. The reversal of 2161836594899 is 9984956381612.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2161836594899 is a prime.

Together with 2161836594901, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2161836594829) 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, 1080918297449 + 1080918297450.

It is an arithmetic number, because the mean of its divisors is an integer number (1080918297450).

Almost surely, 2^{2161836594899} is an apocalyptic number.

2161836594899 is a deficient number, since it is larger than the sum of its proper divisors (1).

2161836594899 is an equidigital number, since it uses as much as digits as its factorization.

2161836594899 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 201553920, while the sum is 71.

The spelling of 2161836594899 in words is "two trillion, one hundred sixty-one billion, eight hundred thirty-six million, five hundred ninety-four thousand, eight hundred ninety-nine".