3649669621 has 8 divisors (see below), whose sum is σ = 3934425600. Its totient is φ = 3365486832.

The previous prime is 3649669619. The next prime is 3649669637. The reversal of 3649669621 is 1269669463.

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 3649669621 - 2¹ = 3649669619 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 (3649669421) 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 7 ways as a sum of consecutive naturals, for example, 130021 + ... + 155578.

It is an arithmetic number, because the mean of its divisors is an integer number (491803200).

Almost surely, 2^3649669621 is an apocalyptic number.

It is an amenable number.

3649669621 is a deficient number, since it is larger than the sum of its proper divisors (284755979).

3649669621 is a wasteful number, since it uses less digits than its factorization.

3649669621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286595.

The product of its digits is 2519424, while the sum is 52.

The square root of 3649669621 is about 60412.4955700392. The cubic root of 3649669621 is about 1539.6352682371.

The spelling of 3649669621 in words is "three billion, six hundred forty-nine million, six hundred sixty-nine thousand, six hundred twenty-one".