4406215861 has 2 divisors, whose sum is σ = 4406215862. Its totient is φ = 4406215860.

The previous prime is 4406215859. The next prime is 4406215889. The reversal of 4406215861 is 1685126044.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3376191025 + 1030024836 = 58105^2 + 32094^2 .

It is a cyclic number.

It is not a de Polignac number, because 4406215861 - 2¹ = 4406215859 is a prime.

Together with 4406215859, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 4406215861.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4406215811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2203107930 + 2203107931.

It is an arithmetic number, because the mean of its divisors is an integer number (2203107931).

Almost surely, 2^4406215861 is an apocalyptic number.

It is an amenable number.

4406215861 is a deficient number, since it is larger than the sum of its proper divisors (1).

4406215861 is an equidigital number, since it uses as much as digits as its factorization.

4406215861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46080, while the sum is 37.

The square root of 4406215861 is about 66379.3330864359. Note that the first 3 decimals coincide. The cubic root of 4406215861 is about 1639.4138125387.

The spelling of 4406215861 in words is "four billion, four hundred six million, two hundred fifteen thousand, eight hundred sixty-one".