72143722356 has 48 divisors (see below), whose sum is σ = 174474699840. Its totient is φ = 23174045440.

The previous prime is 72143722309. The next prime is 72143722369. The reversal of 72143722356 is 65322734127.

It is a super-2 number, since 2×72143722356² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17646 + ... + 380261.

It is an arithmetic number, because the mean of its divisors is an integer number (3634889580).

Almost surely, 2^72143722356 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 72143722356, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87237349920).

72143722356 is an abundant number, since it is smaller than the sum of its proper divisors (102330977484).

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

72143722356 is a wasteful number, since it uses less digits than its factorization.

72143722356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398464 (or 398462 counting only the distinct ones).

The product of its digits is 423360, while the sum is 42.

The spelling of 72143722356 in words is "seventy-two billion, one hundred forty-three million, seven hundred twenty-two thousand, three hundred fifty-six".