1626813006881 has 2 divisors, whose sum is σ = 1626813006882. Its totient is φ = 1626813006880.

The previous prime is 1626813006803. The next prime is 1626813006899. The reversal of 1626813006881 is 1886003186261.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 913056691600 + 713756315281 = 955540^2 + 844841^2 .

It is an emirp because it is prime and its reverse (1886003186261) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1626813006881 - 2¹⁸ = 1626812744737 is a prime.

It is a super-2 number, since 2×1626813006881² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1626813008881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 813406503440 + 813406503441.

It is an arithmetic number, because the mean of its divisors is an integer number (813406503441).

Almost surely, 2^{1626813006881} is an apocalyptic number.

It is an amenable number.

1626813006881 is a deficient number, since it is larger than the sum of its proper divisors (1).

1626813006881 is an equidigital number, since it uses as much as digits as its factorization.

1626813006881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 663552, while the sum is 50.

The spelling of 1626813006881 in words is "one trillion, six hundred twenty-six billion, eight hundred thirteen million, six thousand, eight hundred eighty-one".