8224598591981 has 2 divisors, whose sum is σ = 8224598591982. Its totient is φ = 8224598591980.

The previous prime is 8224598591939. The next prime is 8224598592047. The reversal of 8224598591981 is 1891958954228.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6590176973956 + 1634421618025 = 2567134^2 + 1278445^2 .

It is a cyclic number.

It is not a de Polignac number, because 8224598591981 - 2⁶ = 8224598591917 is a prime.

It is a super-2 number, since 2×8224598591981² (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 (8224598591581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4112299295990 + 4112299295991.

It is an arithmetic number, because the mean of its divisors is an integer number (4112299295991).

Almost surely, 2^{8224598591981} is an apocalyptic number.

It is an amenable number.

8224598591981 is a deficient number, since it is larger than the sum of its proper divisors (1).

8224598591981 is an equidigital number, since it uses as much as digits as its factorization.

8224598591981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 149299200, while the sum is 71.

The spelling of 8224598591981 in words is "eight trillion, two hundred twenty-four billion, five hundred ninety-eight million, five hundred ninety-one thousand, nine hundred eighty-one".