72443903323 has 16 divisors (see below), whose sum is σ = 83209674240. Its totient is φ = 62376501600.

The previous prime is 72443903293. The next prime is 72443903339. The reversal of 72443903323 is 32330934427.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72443903323 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72443963323) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 852061 + ... + 933217.

It is an arithmetic number, because the mean of its divisors is an integer number (5200604640).

Almost surely, 2^72443903323 is an apocalyptic number.

72443903323 is a deficient number, since it is larger than the sum of its proper divisors (10765770917).

72443903323 is a wasteful number, since it uses less digits than its factorization.

72443903323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85458.

The product of its (nonzero) digits is 326592, while the sum is 40.

The spelling of 72443903323 in words is "seventy-two billion, four hundred forty-three million, nine hundred three thousand, three hundred twenty-three".