445201812220 has 72 divisors (see below), whose sum is σ = 1027857694752. Its totient is φ = 161857829760.

The previous prime is 445201812203. The next prime is 445201812221. The reversal of 445201812220 is 22218102544.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (445201812221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13591302 + ... + 13624018.

It is an arithmetic number, because the mean of its divisors is an integer number (14275801316).

Almost surely, 2^445201812220 is an apocalyptic number.

It is an amenable number.

445201812220 is an abundant number, since it is smaller than the sum of its proper divisors (582655882532).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

445201812220 is a wasteful number, since it uses less digits than its factorization.

445201812220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38371 (or 38358 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 31.

Adding to 445201812220 its reverse (22218102544), we get a palindrome (467419914764).

The spelling of 445201812220 in words is "four hundred forty-five billion, two hundred one million, eight hundred twelve thousand, two hundred twenty".