1346448144581 has 2 divisors, whose sum is σ = 1346448144582. Its totient is φ = 1346448144580.

The previous prime is 1346448144551. The next prime is 1346448144659. The reversal of 1346448144581 is 1854418446431.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1309250850625 + 37197293956 = 1144225^2 + 192866^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1346448144581 is a prime.

It is a super-2 number, since 2×1346448144581² (a number of 25 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1346448144511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 673224072290 + 673224072291.

It is an arithmetic number, because the mean of its divisors is an integer number (673224072291).

Almost surely, 2^{1346448144581} is an apocalyptic number.

It is an amenable number.

1346448144581 is a deficient number, since it is larger than the sum of its proper divisors (1).

1346448144581 is an equidigital number, since it uses as much as digits as its factorization.

1346448144581 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5898240, while the sum is 53.

The spelling of 1346448144581 in words is "one trillion, three hundred forty-six billion, four hundred forty-eight million, one hundred forty-four thousand, five hundred eighty-one".