1840422161 has 2 divisors, whose sum is σ = 1840422162. Its totient is φ = 1840422160.

The previous prime is 1840422139. The next prime is 1840422197. The reversal of 1840422161 is 1612240481.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1812119761 + 28302400 = 42569^2 + 5320^2 .

It is a cyclic number.

It is not a de Polignac number, because 1840422161 - 2²² = 1836227857 is a prime.

It is not a weakly prime, because it can be changed into another prime (1840422121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 920211080 + 920211081.

It is an arithmetic number, because the mean of its divisors is an integer number (920211081).

Almost surely, 2^1840422161 is an apocalyptic number.

It is an amenable number.

1840422161 is a deficient number, since it is larger than the sum of its proper divisors (1).

1840422161 is an equidigital number, since it uses as much as digits as its factorization.

1840422161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3072, while the sum is 29.

The square root of 1840422161 is about 42900.1417363626. The cubic root of 1840422161 is about 1225.4788434254.

The spelling of 1840422161 in words is "one billion, eight hundred forty million, four hundred twenty-two thousand, one hundred sixty-one".