72543493438 has 32 divisors (see below), whose sum is σ = 123420810240. Its totient is φ = 31702065120.

The previous prime is 72543493403. The next prime is 72543493453. The reversal of 72543493438 is 83439434527.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 885031 + ... + 963517.

It is an arithmetic number, because the mean of its divisors is an integer number (3856900320).

Almost surely, 2^72543493438 is an apocalyptic number.

72543493438 is a deficient number, since it is larger than the sum of its proper divisors (50877316802).

72543493438 is a wasteful number, since it uses less digits than its factorization.

72543493438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80392.

The product of its digits is 8709120, while the sum is 52.

The spelling of 72543493438 in words is "seventy-two billion, five hundred forty-three million, four hundred ninety-three thousand, four hundred thirty-eight".