9845806844149 has 2 divisors, whose sum is σ = 9845806844150. Its totient is φ = 9845806844148.

The previous prime is 9845806844131. The next prime is 9845806844191. The reversal of 9845806844149 is 9414486085489.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5190491410225 + 4655315433924 = 2278265^2 + 2157618^2 .

It is a cyclic number.

It is not a de Polignac number, because 9845806844149 - 2²³ = 9845798455541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9845806814149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4922903422074 + 4922903422075.

It is an arithmetic number, because the mean of its divisors is an integer number (4922903422075).

Almost surely, 2^{9845806844149} is an apocalyptic number.

It is an amenable number.

9845806844149 is a deficient number, since it is larger than the sum of its proper divisors (1).

9845806844149 is an equidigital number, since it uses as much as digits as its factorization.

9845806844149 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 318504960, while the sum is 70.

The spelling of 9845806844149 in words is "nine trillion, eight hundred forty-five billion, eight hundred six million, eight hundred forty-four thousand, one hundred forty-nine".