3406809858421 has 2 divisors, whose sum is σ = 3406809858422. Its totient is φ = 3406809858420.

The previous prime is 3406809858391. The next prime is 3406809858427. The reversal of 3406809858421 is 1248589086043.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3395123167396 + 11686691025 = 1842586^2 + 108105^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3406809858421 is a prime.

It is a super-2 number, since 2×3406809858421² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3406809858427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1703404929210 + 1703404929211.

It is an arithmetic number, because the mean of its divisors is an integer number (1703404929211).

Almost surely, 2^{3406809858421} is an apocalyptic number.

It is an amenable number.

3406809858421 is a deficient number, since it is larger than the sum of its proper divisors (1).

3406809858421 is an equidigital number, since it uses as much as digits as its factorization.

3406809858421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13271040, while the sum is 58.

It can be divided in two parts, 340680 and 9858421, that added together give a palindrome (10199101).

The spelling of 3406809858421 in words is "three trillion, four hundred six billion, eight hundred nine million, eight hundred fifty-eight thousand, four hundred twenty-one".