3643085691 has 12 divisors (see below), whose sum is σ = 6013982832. Its totient is φ = 2081763216.

The previous prime is 3643085657. The next prime is 3643085741. The reversal of 3643085691 is 1965803463.

It is not a de Polignac number, because 3643085691 - 2⁹ = 3643085179 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3643085891) 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 11 ways as a sum of consecutive naturals, for example, 28913316 + ... + 28913441.

It is an arithmetic number, because the mean of its divisors is an integer number (501165236).

Almost surely, 2^3643085691 is an apocalyptic number.

3643085691 is a deficient number, since it is larger than the sum of its proper divisors (2370897141).

3643085691 is a wasteful number, since it uses less digits than its factorization.

3643085691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57826770 (or 57826767 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 45.

The square root of 3643085691 is about 60357.9795138969. The cubic root of 3643085691 is about 1538.7088873534.

The spelling of 3643085691 in words is "three billion, six hundred forty-three million, eighty-five thousand, six hundred ninety-one".