3685444791 has 16 divisors (see below), whose sum is σ = 5730528000. Its totient is φ = 2105967864.

The previous prime is 3685444781. The next prime is 3685444799. The reversal of 3685444791 is 1974445863.

It is a happy number.

It is not a de Polignac number, because 3685444791 - 2⁶ = 3685444727 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3685444799) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1789761 + ... + 1791818.

It is an arithmetic number, because the mean of its divisors is an integer number (358158000).

Almost surely, 2^3685444791 is an apocalyptic number.

3685444791 is a deficient number, since it is larger than the sum of its proper divisors (2045083209).

3685444791 is an equidigital number, since it uses as much as digits as its factorization.

3685444791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3581603 (or 3581589 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 51.

The square root of 3685444791 is about 60707.8643258021. The cubic root of 3685444791 is about 1544.6495773167.

The spelling of 3685444791 in words is "three billion, six hundred eighty-five million, four hundred forty-four thousand, seven hundred ninety-one".