1826990161 has 2 divisors, whose sum is σ = 1826990162. Its totient is φ = 1826990160.

The previous prime is 1826990159. The next prime is 1826990203. The reversal of 1826990161 is 1610996281.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1017929025 + 809061136 = 31905^2 + 28444^2 .

It is a cyclic number.

It is not a de Polignac number, because 1826990161 - 2¹ = 1826990159 is a prime.

Together with 1826990159, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1826990141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 913495080 + 913495081.

It is an arithmetic number, because the mean of its divisors is an integer number (913495081).

Almost surely, 2^1826990161 is an apocalyptic number.

It is an amenable number.

1826990161 is a deficient number, since it is larger than the sum of its proper divisors (1).

1826990161 is an equidigital number, since it uses as much as digits as its factorization.

1826990161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46656, while the sum is 43.

The square root of 1826990161 is about 42743.3054524331. The cubic root of 1826990161 is about 1222.4902465059.

The spelling of 1826990161 in words is "one billion, eight hundred twenty-six million, nine hundred ninety thousand, one hundred sixty-one".