844243023161 has 2 divisors, whose sum is σ = 844243023162. Its totient is φ = 844243023160.

The previous prime is 844243023157. The next prime is 844243023167. The reversal of 844243023161 is 161320342448.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 751461863161 + 92781160000 = 866869^2 + 304600^2 .

It is a cyclic number.

It is not a de Polignac number, because 844243023161 - 2² = 844243023157 is a prime.

It is not a weakly prime, because it can be changed into another prime (844243023167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 422121511580 + 422121511581.

It is an arithmetic number, because the mean of its divisors is an integer number (422121511581).

Almost surely, 2^844243023161 is an apocalyptic number.

It is an amenable number.

844243023161 is a deficient number, since it is larger than the sum of its proper divisors (1).

844243023161 is an equidigital number, since it uses as much as digits as its factorization.

844243023161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 110592, while the sum is 38.

The spelling of 844243023161 in words is "eight hundred forty-four billion, two hundred forty-three million, twenty-three thousand, one hundred sixty-one".