3685404641 has 8 divisors (see below), whose sum is σ = 3720534120. Its totient is φ = 3650434432.

The previous prime is 3685404631. The next prime is 3685404683. The reversal of 3685404641 is 1464045863.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 262569616 + 3422835025 = 16204^2 + 58505^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3685404641 - 2⁶ = 3685404577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3685404631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6941 + ... + 86133.

It is an arithmetic number, because the mean of its divisors is an integer number (465066765).

Almost surely, 2^3685404641 is an apocalyptic number.

It is an amenable number.

3685404641 is a deficient number, since it is larger than the sum of its proper divisors (35129479).

3685404641 is a wasteful number, since it uses less digits than its factorization.

3685404641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79635.

The product of its (nonzero) digits is 276480, while the sum is 41.

The square root of 3685404641 is about 60707.5336428684. The cubic root of 3685404641 is about 1544.6439680520.

The spelling of 3685404641 in words is "three billion, six hundred eighty-five million, four hundred four thousand, six hundred forty-one".