4040404861 has 2 divisors, whose sum is σ = 4040404862. Its totient is φ = 4040404860.

The previous prime is 4040404859. The next prime is 4040404883. The reversal of 4040404861 is 1684040404.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3683761636 + 356643225 = 60694^2 + 18885^2 .

It is a cyclic number.

It is not a de Polignac number, because 4040404861 - 2¹ = 4040404859 is a prime.

Together with 4040404859, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4040404811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2020202430 + 2020202431.

It is an arithmetic number, because the mean of its divisors is an integer number (2020202431).

Almost surely, 2^4040404861 is an apocalyptic number.

It is an amenable number.

4040404861 is a deficient number, since it is larger than the sum of its proper divisors (1).

4040404861 is an equidigital number, since it uses as much as digits as its factorization.

4040404861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12288, while the sum is 31.

The square root of 4040404861 is about 63564.1790712348. The cubic root of 4040404861 is about 1592.7280488854.

The spelling of 4040404861 in words is "four billion, forty million, four hundred four thousand, eight hundred sixty-one".