72222449520 has 160 divisors (see below), whose sum is σ = 243325051200. Its totient is φ = 17614651392.

The previous prime is 72222449503. The next prime is 72222449521. The reversal of 72222449520 is 2594422227.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72222449521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 233896 + ... + 446264.

It is an arithmetic number, because the mean of its divisors is an integer number (1520781570).

Almost surely, 2^72222449520 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 72222449520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (121662525600).

72222449520 is an abundant number, since it is smaller than the sum of its proper divisors (171102601680).

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

72222449520 is a wasteful number, since it uses less digits than its factorization.

72222449520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212507 (or 212501 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 39.

The spelling of 72222449520 in words is "seventy-two billion, two hundred twenty-two million, four hundred forty-nine thousand, five hundred twenty".