1244106155161 has 2 divisors, whose sum is σ = 1244106155162. Its totient is φ = 1244106155160.

The previous prime is 1244106155143. The next prime is 1244106155209. The reversal of 1244106155161 is 1615516014421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 625435814025 + 618670341136 = 790845^2 + 786556^2 .

It is a cyclic number.

It is not a de Polignac number, because 1244106155161 - 2⁹ = 1244106154649 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1244106155161.

It is not a weakly prime, because it can be changed into another prime (1244106158161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 622053077580 + 622053077581.

It is an arithmetic number, because the mean of its divisors is an integer number (622053077581).

Almost surely, 2^{1244106155161} is an apocalyptic number.

It is an amenable number.

1244106155161 is a deficient number, since it is larger than the sum of its proper divisors (1).

1244106155161 is an equidigital number, since it uses as much as digits as its factorization.

1244106155161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28800, while the sum is 37.

The spelling of 1244106155161 in words is "one trillion, two hundred forty-four billion, one hundred six million, one hundred fifty-five thousand, one hundred sixty-one".