72723658423 has 4 divisors (see below), whose sum is σ = 78317786008. Its totient is φ = 67129530840.

The previous prime is 72723658421. The next prime is 72723658433. The reversal of 72723658423 is 32485632727.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32485632727 = 26017 ⋅1248631.

It is a cyclic number.

It is not a de Polignac number, because 72723658423 - 2¹ = 72723658421 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 (72723658421) 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, 2797063773 + ... + 2797063798.

It is an arithmetic number, because the mean of its divisors is an integer number (19579446502).

Almost surely, 2^72723658423 is an apocalyptic number.

72723658423 is a deficient number, since it is larger than the sum of its proper divisors (5594127585).

72723658423 is a wasteful number, since it uses less digits than its factorization.

72723658423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5594127584.

The product of its digits is 3386880, while the sum is 49.

The spelling of 72723658423 in words is "seventy-two billion, seven hundred twenty-three million, six hundred fifty-eight thousand, four hundred twenty-three".