72543493437 has 4 divisors (see below), whose sum is σ = 96724657920. Its totient is φ = 48362328956.

The previous prime is 72543493403. The next prime is 72543493453. The reversal of 72543493437 is 73439434527.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 72543493437 - 2²⁶ = 72476384573 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 72543493437.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72543493037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12090582237 + ... + 12090582242.

It is an arithmetic number, because the mean of its divisors is an integer number (24181164480).

Almost surely, 2^72543493437 is an apocalyptic number.

It is an amenable number.

72543493437 is a deficient number, since it is larger than the sum of its proper divisors (24181164483).

72543493437 is a wasteful number, since it uses less digits than its factorization.

72543493437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24181164482.

The product of its digits is 7620480, while the sum is 51.

The spelling of 72543493437 in words is "seventy-two billion, five hundred forty-three million, four hundred ninety-three thousand, four hundred thirty-seven".