72940517423 has 4 divisors (see below), whose sum is σ = 73253567088. Its totient is φ = 72627467760.

The previous prime is 72940517417. The next prime is 72940517459. The reversal of 72940517423 is 32471504927.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 72940517423 - 2²⁴ = 72923740207 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 (72940517323) 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, 156524483 + ... + 156524948.

It is an arithmetic number, because the mean of its divisors is an integer number (18313391772).

Almost surely, 2^72940517423 is an apocalyptic number.

72940517423 is a deficient number, since it is larger than the sum of its proper divisors (313049665).

72940517423 is a wasteful number, since it uses less digits than its factorization.

72940517423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313049664.

The product of its (nonzero) digits is 423360, while the sum is 44.

The spelling of 72940517423 in words is "seventy-two billion, nine hundred forty million, five hundred seventeen thousand, four hundred twenty-three".