72324505881 has 32 divisors (see below), whose sum is σ = 107661294720. Its totient is φ = 47985556032.

The previous prime is 72324505867. The next prime is 72324505931. The reversal of 72324505881 is 18850542327.

72324505881 is a `hidden beast` number, since 7 + 23 + 2 + 45 + 0 + 588 + 1 = 666.

It is not a de Polignac number, because 72324505881 - 2¹⁷ = 72324374809 is a prime.

It is a super-2 number, since 2×72324505881² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (72324505811) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6109290 + ... + 6121116.

It is an arithmetic number, because the mean of its divisors is an integer number (3364415460).

Almost surely, 2^72324505881 is an apocalyptic number.

It is an amenable number.

72324505881 is a deficient number, since it is larger than the sum of its proper divisors (35336788839).

72324505881 is a wasteful number, since it uses less digits than its factorization.

72324505881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12902 (or 12896 counting only the distinct ones).

The product of its (nonzero) digits is 537600, while the sum is 45.

The spelling of 72324505881 in words is "seventy-two billion, three hundred twenty-four million, five hundred five thousand, eight hundred eighty-one".