72715552243 has 4 divisors (see below), whose sum is σ = 72738944080. Its totient is φ = 72692160408.

The previous prime is 72715552229. The next prime is 72715552249. The reversal of 72715552243 is 34225551727.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34225551727 = 55849 ⋅612823.

It is a cyclic number.

It is not a de Polignac number, because 72715552243 - 2⁹ = 72715551731 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 72715552243.

It is not an unprimeable number, because it can be changed into a prime (72715552249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11691255 + ... + 11697472.

It is an arithmetic number, because the mean of its divisors is an integer number (18184736020).

Almost surely, 2^72715552243 is an apocalyptic number.

72715552243 is a deficient number, since it is larger than the sum of its proper divisors (23391837).

72715552243 is a wasteful number, since it uses less digits than its factorization.

72715552243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23391836.

The product of its digits is 588000, while the sum is 43.

The spelling of 72715552243 in words is "seventy-two billion, seven hundred fifteen million, five hundred fifty-two thousand, two hundred forty-three".