8022008591981 has 2 divisors, whose sum is σ = 8022008591982. Its totient is φ = 8022008591980.

The previous prime is 8022008591959. The next prime is 8022008592019. The reversal of 8022008591981 is 1891958002208.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7953556242025 + 68452349956 = 2820205^2 + 261634^2 .

It is a cyclic number.

It is not a de Polignac number, because 8022008591981 - 2³⁸ = 7747130685037 is a prime.

It is a super-2 number, since 2×8022008591981² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8022008591081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4011004295990 + 4011004295991.

It is an arithmetic number, because the mean of its divisors is an integer number (4011004295991).

Almost surely, 2^{8022008591981} is an apocalyptic number.

It is an amenable number.

8022008591981 is a deficient number, since it is larger than the sum of its proper divisors (1).

8022008591981 is an equidigital number, since it uses as much as digits as its factorization.

8022008591981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 829440, while the sum is 53.

The spelling of 8022008591981 in words is "eight trillion, twenty-two billion, eight million, five hundred ninety-one thousand, nine hundred eighty-one".