72544282689 has 4 divisors (see below), whose sum is σ = 96725710256. Its totient is φ = 48362855124.

The previous prime is 72544282651. The next prime is 72544282697. The reversal of 72544282689 is 98628244527.

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 not a de Polignac number, because 72544282689 - 2¹⁶ = 72544217153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72544282639) 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, 12090713779 + ... + 12090713784.

It is an arithmetic number, because the mean of its divisors is an integer number (24181427564).

Almost surely, 2^72544282689 is an apocalyptic number.

It is an amenable number.

72544282689 is a deficient number, since it is larger than the sum of its proper divisors (24181427567).

72544282689 is a wasteful number, since it uses less digits than its factorization.

72544282689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24181427566.

The product of its digits is 15482880, while the sum is 57.

The spelling of 72544282689 in words is "seventy-two billion, five hundred forty-four million, two hundred eighty-two thousand, six hundred eighty-nine".