1344343405661 has 2 divisors, whose sum is σ = 1344343405662. Its totient is φ = 1344343405660.

The previous prime is 1344343405651. The next prime is 1344343405679. The reversal of 1344343405661 is 1665043434431.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 821889109561 + 522454296100 = 906581^2 + 722810^2 .

It is a cyclic number.

It is not a de Polignac number, because 1344343405661 - 2¹⁰ = 1344343404637 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1344343405631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 672171702830 + 672171702831.

It is an arithmetic number, because the mean of its divisors is an integer number (672171702831).

Almost surely, 2^{1344343405661} is an apocalyptic number.

It is an amenable number.

1344343405661 is a deficient number, since it is larger than the sum of its proper divisors (1).

1344343405661 is an equidigital number, since it uses as much as digits as its factorization.

1344343405661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1244160, while the sum is 44.

The spelling of 1344343405661 in words is "one trillion, three hundred forty-four billion, three hundred forty-three million, four hundred five thousand, six hundred sixty-one".