3405163681 has 4 divisors (see below), whose sum is σ = 3411854100. Its totient is φ = 3398473264.

The previous prime is 3405163651. The next prime is 3405163739. The reversal of 3405163681 is 1863615043.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1935208081 + 1469955600 = 43991^2 + 38340^2 .

It is a cyclic number.

It is not a de Polignac number, because 3405163681 - 2⁵ = 3405163649 is a prime.

It is a super-2 number, since 2×3405163681² = 23190279388802939522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3405163681.

It is not an unprimeable number, because it can be changed into a prime (3405163651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3344446 + ... + 3345463.

It is an arithmetic number, because the mean of its divisors is an integer number (852963525).

Almost surely, 2^3405163681 is an apocalyptic number.

It is an amenable number.

3405163681 is a deficient number, since it is larger than the sum of its proper divisors (6690419).

3405163681 is an equidigital number, since it uses as much as digits as its factorization.

3405163681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6690418.

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 3405163681 is about 58353.7803488343. The cubic root of 3405163681 is about 1504.4554463769.

The spelling of 3405163681 in words is "three billion, four hundred five million, one hundred sixty-three thousand, six hundred eighty-one".