1626813008881 has 2 divisors, whose sum is σ = 1626813008882. Its totient is φ = 1626813008880.

The previous prime is 1626813008879. The next prime is 1626813008893. The reversal of 1626813008881 is 1888003186261.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 813721264225 + 813091744656 = 902065^2 + 901716^2 .

It is a cyclic number.

It is not a de Polignac number, because 1626813008881 - 2¹ = 1626813008879 is a prime.

It is a super-2 number, since 2×1626813008881² (a number of 25 digits) contains 22 as substring.

Together with 1626813008879, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1626813008861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 813406504440 + 813406504441.

It is an arithmetic number, because the mean of its divisors is an integer number (813406504441).

Almost surely, 2^{1626813008881} is an apocalyptic number.

It is an amenable number.

1626813008881 is a deficient number, since it is larger than the sum of its proper divisors (1).

1626813008881 is an equidigital number, since it uses as much as digits as its factorization.

1626813008881 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 884736, while the sum is 52.

The spelling of 1626813008881 in words is "one trillion, six hundred twenty-six billion, eight hundred thirteen million, eight thousand, eight hundred eighty-one".