1840845841 has 4 divisors (see below), whose sum is σ = 1840993972. Its totient is φ = 1840697712.

The previous prime is 1840845821. The next prime is 1840845863. The reversal of 1840845841 is 1485480481.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1485480481 = 1279 ⋅1161439.

It can be written as a sum of positive squares in 2 ways, for example, as 1669131025 + 171714816 = 40855^2 + 13104^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1840845841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1840845821) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53526 + ... + 80911.

It is an arithmetic number, because the mean of its divisors is an integer number (460248493).

Almost surely, 2^1840845841 is an apocalyptic number.

It is an amenable number.

1840845841 is a deficient number, since it is larger than the sum of its proper divisors (148131).

1840845841 is a wasteful number, since it uses less digits than its factorization.

1840845841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148130.

The product of its (nonzero) digits is 163840, while the sum is 43.

The square root of 1840845841 is about 42905.0794312282. The cubic root of 1840845841 is about 1225.5728745758.

The spelling of 1840845841 in words is "one billion, eight hundred forty million, eight hundred forty-five thousand, eight hundred forty-one".