872639827181 has 2 divisors, whose sum is σ = 872639827182. Its totient is φ = 872639827180.

The previous prime is 872639827177. The next prime is 872639827207. The reversal of 872639827181 is 181728936278.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 774206412100 + 98433415081 = 879890^2 + 313741^2 .

It is a cyclic number.

It is not a de Polignac number, because 872639827181 - 2² = 872639827177 is a prime.

It is a super-2 number, since 2×872639827181² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (872639829181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 436319913590 + 436319913591.

It is an arithmetic number, because the mean of its divisors is an integer number (436319913591).

Almost surely, 2^872639827181 is an apocalyptic number.

It is an amenable number.

872639827181 is a deficient number, since it is larger than the sum of its proper divisors (1).

872639827181 is an equidigital number, since it uses as much as digits as its factorization.

872639827181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16257024, while the sum is 62.

The spelling of 872639827181 in words is "eight hundred seventy-two billion, six hundred thirty-nine million, eight hundred twenty-seven thousand, one hundred eighty-one".