876008021279981 has 2 divisors, whose sum is σ = 876008021279982. Its totient is φ = 876008021279980.

The previous prime is 876008021279977. The next prime is 876008021280037. The reversal of 876008021279981 is 189972120800678.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 793177381194025 + 82830640085956 = 28163405^2 + 9101134^2 .

It is a cyclic number.

It is not a de Polignac number, because 876008021279981 - 2² = 876008021279977 is a prime.

It is a super-2 number, since 2×876008021279981² (a number of 31 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (876008021279381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 438004010639990 + 438004010639991.

It is an arithmetic number, because the mean of its divisors is an integer number (438004010639991).

Almost surely, 2^{876008021279981} is an apocalyptic number.

It is an amenable number.

876008021279981 is a deficient number, since it is larger than the sum of its proper divisors (1).

876008021279981 is an equidigital number, since it uses as much as digits as its factorization.

876008021279981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48771072, while the sum is 68.

The spelling of 876008021279981 in words is "eight hundred seventy-six trillion, eight billion, twenty-one million, two hundred seventy-nine thousand, nine hundred eighty-one".