3663621215 has 16 divisors (see below), whose sum is σ = 4506528096. Its totient is φ = 2857536000.

The previous prime is 3663621167. The next prime is 3663621253. The reversal of 3663621215 is 5121263663.

3663621215 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3663621215 - 2⁸ = 3663620959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 364244 + ... + 374166.

It is an arithmetic number, because the mean of its divisors is an integer number (281658006).

Almost surely, 2^3663621215 is an apocalyptic number.

3663621215 is a deficient number, since it is larger than the sum of its proper divisors (842906881).

3663621215 is a wasteful number, since it uses less digits than its factorization.

3663621215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11770.

The product of its digits is 38880, while the sum is 35.

The square root of 3663621215 is about 60527.8548686470. The cubic root of 3663621215 is about 1541.5946285242.

Adding to 3663621215 its reverse (5121263663), we get a palindrome (8784884878).

The spelling of 3663621215 in words is "three billion, six hundred sixty-three million, six hundred twenty-one thousand, two hundred fifteen".