72748888789 has 4 divisors (see below), whose sum is σ = 74440723456. Its totient is φ = 71057054124.

The previous prime is 72748888753. The next prime is 72748888801. The reversal of 72748888789 is 98788884727.

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 72748888789 - 2⁷ = 72748888661 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 (72748888189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 845917269 + ... + 845917354.

It is an arithmetic number, because the mean of its divisors is an integer number (18610180864).

Almost surely, 2^72748888789 is an apocalyptic number.

It is an amenable number.

72748888789 is a deficient number, since it is larger than the sum of its proper divisors (1691834667).

72748888789 is a wasteful number, since it uses less digits than its factorization.

72748888789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1691834666.

The product of its digits is 809238528, while the sum is 76.

The spelling of 72748888789 in words is "seventy-two billion, seven hundred forty-eight million, eight hundred eighty-eight thousand, seven hundred eighty-nine".