3221615615641 has 4 divisors (see below), whose sum is σ = 3296536909072. Its totient is φ = 3146694322212.

The previous prime is 3221615615551. The next prime is 3221615615663. The reversal of 3221615615641 is 1465165161223.

3221615615641 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3221615615641 - 2¹⁷ = 3221615484569 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43), and also a Moran number because the ratio is a prime number: 74921293387 = 3221615615641 / (3 + 2 + 2 + 1 + 6 + 1 + 5 + 6 + 1 + 5 + 6 + 4 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3221615615671) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37460646651 + ... + 37460646736.

It is an arithmetic number, because the mean of its divisors is an integer number (824134227268).

Almost surely, 2^{3221615615641} is an apocalyptic number.

It is an amenable number.

3221615615641 is a deficient number, since it is larger than the sum of its proper divisors (74921293431).

3221615615641 is an equidigital number, since it uses as much as digits as its factorization.

3221615615641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74921293430.

The product of its digits is 259200, while the sum is 43.

The spelling of 3221615615641 in words is "three trillion, two hundred twenty-one billion, six hundred fifteen million, six hundred fifteen thousand, six hundred forty-one".