72485331361 has 3 divisors (see below), whose sum is σ = 72485600593. Its totient is φ = 72485062130.

The previous prime is 72485331353. The next prime is 72485331377. The reversal of 72485331361 is 16313358427.

The square root of 72485331361 is 269231.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 16313358427 = 167 ⋅97684781.

It is not a de Polignac number, because 72485331361 - 2³ = 72485331353 is a prime.

It is a super-2 number, since 2×72485331361² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72485331301) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 134616 + ... + 403846.

Almost surely, 2^72485331361 is an apocalyptic number.

72485331361 is the 269231-st square number.

72485331361 is the 134616-th centered octagonal number.

It is an amenable number.

72485331361 is a deficient number, since it is larger than the sum of its proper divisors (269232).

72485331361 is an frugal number, since it uses more digits than its factorization.

72485331361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 538462 (or 269231 counting only the distinct ones).

The product of its digits is 362880, while the sum is 43.

Adding to 72485331361 its reverse (16313358427), we get a palindrome (88798689788).

The spelling of 72485331361 in words is "seventy-two billion, four hundred eighty-five million, three hundred thirty-one thousand, three hundred sixty-one".