3652445621 has 12 divisors (see below), whose sum is σ = 4021953516. Its totient is φ = 3314382720.

The previous prime is 3652445603. The next prime is 3652445711. The reversal of 3652445621 is 1265442563.

It can be written as a sum of positive squares in 2 ways, for example, as 1633291396 + 2019154225 = 40414^2 + 44935^2 .

It is not a de Polignac number, because 3652445621 - 2⁶ = 3652445557 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 (3652445521) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40301 + ... + 94493.

It is an arithmetic number, because the mean of its divisors is an integer number (335162793).

Almost surely, 2^3652445621 is an apocalyptic number.

It is an amenable number.

3652445621 is a deficient number, since it is larger than the sum of its proper divisors (369507895).

3652445621 is a wasteful number, since it uses less digits than its factorization.

3652445621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54772 (or 54761 counting only the distinct ones).

The product of its digits is 172800, while the sum is 38.

The square root of 3652445621 is about 60435.4665821321. The cubic root of 3652445621 is about 1540.0255267878.

The spelling of 3652445621 in words is "three billion, six hundred fifty-two million, four hundred forty-five thousand, six hundred twenty-one".