72543493439 has 8 divisors (see below), whose sum is σ = 73029811632. Its totient is φ = 72058314240.

The previous prime is 72543493403. The next prime is 72543493453. The reversal of 72543493439 is 93439434527.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72543493439 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72543493489) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 156749 + ... + 411894.

It is an arithmetic number, because the mean of its divisors is an integer number (9128726454).

Almost surely, 2^72543493439 is an apocalyptic number.

72543493439 is a deficient number, since it is larger than the sum of its proper divisors (486318193).

72543493439 is a wasteful number, since it uses less digits than its factorization.

72543493439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 569497.

The product of its digits is 9797760, while the sum is 53.

The spelling of 72543493439 in words is "seventy-two billion, five hundred forty-three million, four hundred ninety-three thousand, four hundred thirty-nine".