445503213320 has 128 divisors (see below), whose sum is σ = 1101885482880. Its totient is φ = 160763904000.

The previous prime is 445503213313. The next prime is 445503213349. The reversal of 445503213320 is 23312305544.

It is a super-2 number, since 2×445503213320² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 39097544 + ... + 39108936.

It is an arithmetic number, because the mean of its divisors is an integer number (8608480335).

Almost surely, 2^445503213320 is an apocalyptic number.

445503213320 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 445503213320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (550942741440).

445503213320 is an abundant number, since it is smaller than the sum of its proper divisors (656382269560).

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

445503213320 is a wasteful number, since it uses less digits than its factorization.

445503213320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12087 (or 12083 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 32.

Adding to 445503213320 its reverse (23312305544), we get a palindrome (468815518864).

The spelling of 445503213320 in words is "four hundred forty-five billion, five hundred three million, two hundred thirteen thousand, three hundred twenty".