72221879268 has 144 divisors (see below), whose sum is σ = 228688911360. Its totient is φ = 18669873600.

The previous prime is 72221879243. The next prime is 72221879269. The reversal of 72221879268 is 86297812227.

It is not an unprimeable number, because it can be changed into a prime (72221879269) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 523153 + ... + 646631.

It is an arithmetic number, because the mean of its divisors is an integer number (1588117440).

Almost surely, 2^72221879268 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 72221879268, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (114344455680).

72221879268 is an abundant number, since it is smaller than the sum of its proper divisors (156467032092).

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

72221879268 is a wasteful number, since it uses less digits than its factorization.

72221879268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123718 (or 123713 counting only the distinct ones).

The product of its digits is 2709504, while the sum is 54.

The spelling of 72221879268 in words is "seventy-two billion, two hundred twenty-one million, eight hundred seventy-nine thousand, two hundred sixty-eight".