72321393724 has 24 divisors (see below), whose sum is σ = 127093826048. Its totient is φ = 36009042480.

The previous prime is 72321393721. The next prime is 72321393733. The reversal of 72321393724 is 42739312327.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72321393721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1753459 + ... + 1794229.

Almost surely, 2^72321393724 is an apocalyptic number.

It is an amenable number.

72321393724 is a deficient number, since it is larger than the sum of its proper divisors (54772432324).

72321393724 is a wasteful number, since it uses less digits than its factorization.

72321393724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42625 (or 42623 counting only the distinct ones).

The product of its digits is 381024, while the sum is 43.

The spelling of 72321393724 in words is "seventy-two billion, three hundred twenty-one million, three hundred ninety-three thousand, seven hundred twenty-four".