3681144621 has 48 divisors (see below), whose sum is σ = 6690203520. Its totient is φ = 1894700160.

The previous prime is 3681144611. The next prime is 3681144659. The reversal of 3681144621 is 1264411863.

It is not a de Polignac number, because 3681144621 - 2⁶ = 3681144557 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3681144611) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 51171 + ... + 99903.

It is an arithmetic number, because the mean of its divisors is an integer number (139379240).

Almost surely, 2^3681144621 is an apocalyptic number.

It is an amenable number.

3681144621 is a deficient number, since it is larger than the sum of its proper divisors (3009058899).

3681144621 is a wasteful number, since it uses less digits than its factorization.

3681144621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48866 (or 48863 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The square root of 3681144621 is about 60672.4370781329. The cubic root of 3681144621 is about 1544.0485787746.

The spelling of 3681144621 in words is "three billion, six hundred eighty-one million, one hundred forty-four thousand, six hundred twenty-one".