3651233544421 has 4 divisors (see below), whose sum is σ = 3651840975744. Its totient is φ = 3650626113100.

The previous prime is 3651233544341. The next prime is 3651233544451. The reversal of 3651233544421 is 1244453321563.

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 3651233544421 - 2⁷ = 3651233544293 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 (3651233544451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 303706645 + ... + 303718666.

It is an arithmetic number, because the mean of its divisors is an integer number (912960243936).

Almost surely, 2^{3651233544421} is an apocalyptic number.

It is an amenable number.

3651233544421 is a deficient number, since it is larger than the sum of its proper divisors (607431323).

3651233544421 is an equidigital number, since it uses as much as digits as its factorization.

3651233544421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 607431322.

The product of its digits is 1036800, while the sum is 43.

Adding to 3651233544421 its reverse (1244453321563), we get a palindrome (4895686865984).

The spelling of 3651233544421 in words is "three trillion, six hundred fifty-one billion, two hundred thirty-three million, five hundred forty-four thousand, four hundred twenty-one".