72244682861 has 4 divisors (see below), whose sum is σ = 77801966172. Its totient is φ = 66687399552.

The previous prime is 72244682857. The next prime is 72244682947. The reversal of 72244682861 is 16828644227.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16828644227 = 79 ⋅213020813.

It can be written as a sum of positive squares in 2 ways, for example, as 7311960100 + 64932722761 = 85510^2 + 254819^2 .

It is a cyclic number.

It is not a de Polignac number, because 72244682861 - 2² = 72244682857 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72244685861) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2778641636 + ... + 2778641661.

It is an arithmetic number, because the mean of its divisors is an integer number (19450491543).

Almost surely, 2^72244682861 is an apocalyptic number.

It is an amenable number.

72244682861 is a deficient number, since it is larger than the sum of its proper divisors (5557283311).

72244682861 is a wasteful number, since it uses less digits than its factorization.

72244682861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5557283310.

The product of its digits is 2064384, while the sum is 50.

The spelling of 72244682861 in words is "seventy-two billion, two hundred forty-four million, six hundred eighty-two thousand, eight hundred sixty-one".