1346406567581 has 2 divisors, whose sum is σ = 1346406567582. Its totient is φ = 1346406567580.

The previous prime is 1346406567529. The next prime is 1346406567587. The reversal of 1346406567581 is 1857656046431.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 867114816100 + 479291751481 = 931190^2 + 692309^2 .

It is an emirp because it is prime and its reverse (1857656046431) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1346406567581 is a prime.

It is a super-2 number, since 2×1346406567581² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1346406567587) 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, 673203283790 + 673203283791.

It is an arithmetic number, because the mean of its divisors is an integer number (673203283791).

Almost surely, 2^{1346406567581} is an apocalyptic number.

It is an amenable number.

1346406567581 is a deficient number, since it is larger than the sum of its proper divisors (1).

1346406567581 is an equidigital number, since it uses as much as digits as its factorization.

1346406567581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14515200, while the sum is 56.

The spelling of 1346406567581 in words is "one trillion, three hundred forty-six billion, four hundred six million, five hundred sixty-seven thousand, five hundred eighty-one".