3805404181663 has 4 divisors (see below), whose sum is σ = 4349033350480. Its totient is φ = 3261775012848.

The previous prime is 3805404181661. The next prime is 3805404181669. The reversal of 3805404181663 is 3661814045083.

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

It is a cyclic number.

It is not a de Polignac number, because 3805404181663 - 2¹ = 3805404181661 is a prime.

It is a super-2 number, since 2×3805404181663² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3805404181661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 271814584398 + ... + 271814584411.

It is an arithmetic number, because the mean of its divisors is an integer number (1087258337620).

Almost surely, 2^{3805404181663} is an apocalyptic number.

3805404181663 is a deficient number, since it is larger than the sum of its proper divisors (543629168817).

3805404181663 is an equidigital number, since it uses as much as digits as its factorization.

3805404181663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 543629168816.

The product of its (nonzero) digits is 1658880, while the sum is 49.

The spelling of 3805404181663 in words is "three trillion, eight hundred five billion, four hundred four million, one hundred eighty-one thousand, six hundred sixty-three".