72760275281 has 4 divisors (see below), whose sum is σ = 77040291492. Its totient is φ = 68480259072.

The previous prime is 72760275277. The next prime is 72760275293. The reversal of 72760275281 is 18257206727.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18257206727 = 7487 ⋅2438521.

It can be written as a sum of positive squares in 2 ways, for example, as 67047334225 + 5712941056 = 258935^2 + 75584^2 .

It is a cyclic number.

It is not a de Polignac number, because 72760275281 - 2² = 72760275277 is a prime.

It is a super-2 number, since 2×72760275281² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (72760277281) 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 3 ways as a sum of consecutive naturals, for example, 2140008080 + ... + 2140008113.

It is an arithmetic number, because the mean of its divisors is an integer number (19260072873).

Almost surely, 2^72760275281 is an apocalyptic number.

It is an amenable number.

72760275281 is a deficient number, since it is larger than the sum of its proper divisors (4280016211).

72760275281 is a wasteful number, since it uses less digits than its factorization.

72760275281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4280016210.

The product of its (nonzero) digits is 658560, while the sum is 47.

The spelling of 72760275281 in words is "seventy-two billion, seven hundred sixty million, two hundred seventy-five thousand, two hundred eighty-one".