45645234221 has 4 divisors (see below), whose sum is σ = 45663799200. Its totient is φ = 45626669244.

The previous prime is 45645234199. The next prime is 45645234247. The reversal of 45645234221 is 12243254654.

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 45645234221 - 2⁶ = 45645234157 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 (45645234121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9278801 + ... + 9283718.

It is an arithmetic number, because the mean of its divisors is an integer number (11415949800).

Almost surely, 2^45645234221 is an apocalyptic number.

It is an amenable number.

45645234221 is a deficient number, since it is larger than the sum of its proper divisors (18564979).

45645234221 is a wasteful number, since it uses less digits than its factorization.

45645234221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18564978.

The product of its digits is 230400, while the sum is 38.

Adding to 45645234221 its reverse (12243254654), we get a palindrome (57888488875).

The spelling of 45645234221 in words is "forty-five billion, six hundred forty-five million, two hundred thirty-four thousand, two hundred twenty-one".