3643995671 has 8 divisors (see below), whose sum is σ = 3655575744. Its totient is φ = 3632428800.

The previous prime is 3643995659. The next prime is 3643995721. The reversal of 3643995671 is 1765993463.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3643995671 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3643995631) 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, 951266 + ... + 955088.

It is an arithmetic number, because the mean of its divisors is an integer number (456946968).

Almost surely, 2^3643995671 is an apocalyptic number.

3643995671 is a deficient number, since it is larger than the sum of its proper divisors (11580073).

3643995671 is a wasteful number, since it uses less digits than its factorization.

3643995671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6601.

The product of its digits is 3674160, while the sum is 53.

The square root of 3643995671 is about 60365.5172345935. The cubic root of 3643995671 is about 1538.8369910057.

The spelling of 3643995671 in words is "three billion, six hundred forty-three million, nine hundred ninety-five thousand, six hundred seventy-one".