72189670244 has 12 divisors (see below), whose sum is σ = 126334879104. Its totient is φ = 36093990504.

The previous prime is 72189670171. The next prime is 72189670297. The reversal of 72189670244 is 44207698127.

It is a happy number.

It is a super-2 number, since 2×72189670244² (a number of 23 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (50) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 72189670192 and 72189670201.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5957 + ... + 380019.

It is an arithmetic number, because the mean of its divisors is an integer number (10527906592).

Almost surely, 2^72189670244 is an apocalyptic number.

It is an amenable number.

72189670244 is a deficient number, since it is larger than the sum of its proper divisors (54145208860).

72189670244 is a wasteful number, since it uses less digits than its factorization.

72189670244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 422314 (or 422312 counting only the distinct ones).

The product of its (nonzero) digits is 1354752, while the sum is 50.

The spelling of 72189670244 in words is "seventy-two billion, one hundred eighty-nine million, six hundred seventy thousand, two hundred forty-four".