72132324540 has 48 divisors (see below), whose sum is σ = 201992128800. Its totient is φ = 19233227520.

The previous prime is 72132324499. The next prime is 72132324541. The reversal of 72132324540 is 4542323127.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72132324541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 549186 + ... + 667734.

It is an arithmetic number, because the mean of its divisors is an integer number (4208169350).

Almost surely, 2^72132324540 is an apocalyptic number.

It is an amenable number.

72132324540 is an abundant number, since it is smaller than the sum of its proper divisors (129859804260).

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

72132324540 is a wasteful number, since it uses less digits than its factorization.

72132324540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128702 (or 128700 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 33.

Adding to 72132324540 its reverse (4542323127), we get a palindrome (76674647667).

The spelling of 72132324540 in words is "seventy-two billion, one hundred thirty-two million, three hundred twenty-four thousand, five hundred forty".