1845863161 has 2 divisors, whose sum is σ = 1845863162. Its totient is φ = 1845863160.

The previous prime is 1845863153. The next prime is 1845863197. The reversal of 1845863161 is 1613685481.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1443620025 + 402243136 = 37995^2 + 20056^2 .

It is an emirp because it is prime and its reverse (1613685481) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1845863161 - 2³ = 1845863153 is a prime.

It is not a weakly prime, because it can be changed into another prime (1845861161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 922931580 + 922931581.

It is an arithmetic number, because the mean of its divisors is an integer number (922931581).

Almost surely, 2^1845863161 is an apocalyptic number.

It is an amenable number.

1845863161 is a deficient number, since it is larger than the sum of its proper divisors (1).

1845863161 is an equidigital number, since it uses as much as digits as its factorization.

1845863161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 138240, while the sum is 43.

The square root of 1845863161 is about 42963.5096448137. The cubic root of 1845863161 is about 1226.6853184766.

The spelling of 1845863161 in words is "one billion, eight hundred forty-five million, eight hundred sixty-three thousand, one hundred sixty-one".