1840610405849 has 2 divisors, whose sum is σ = 1840610405850. Its totient is φ = 1840610405848.

The previous prime is 1840610405813. The next prime is 1840610405857. The reversal of 1840610405849 is 9485040160481.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1679253139600 + 161357266249 = 1295860^2 + 401693^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1840610405849 is a prime.

It is a super-2 number, since 2×1840610405849² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1840610405797 and 1840610405806.

It is not a weakly prime, because it can be changed into another prime (1840610405449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 920305202924 + 920305202925.

It is an arithmetic number, because the mean of its divisors is an integer number (920305202925).

Almost surely, 2^{1840610405849} is an apocalyptic number.

It is an amenable number.

1840610405849 is a deficient number, since it is larger than the sum of its proper divisors (1).

1840610405849 is an equidigital number, since it uses as much as digits as its factorization.

1840610405849 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1105920, while the sum is 50.

The spelling of 1840610405849 in words is "one trillion, eight hundred forty billion, six hundred ten million, four hundred five thousand, eight hundred forty-nine".