1244406135761 has 2 divisors, whose sum is σ = 1244406135762. Its totient is φ = 1244406135760.

The previous prime is 1244406135737. The next prime is 1244406135781. The reversal of 1244406135761 is 1675316044421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 996740660161 + 247665475600 = 998369^2 + 497660^2 .

It is a cyclic number.

It is not a de Polignac number, because 1244406135761 - 2⁶ = 1244406135697 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1244406135781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 622203067880 + 622203067881.

It is an arithmetic number, because the mean of its divisors is an integer number (622203067881).

Almost surely, 2^{1244406135761} is an apocalyptic number.

It is an amenable number.

1244406135761 is a deficient number, since it is larger than the sum of its proper divisors (1).

1244406135761 is an equidigital number, since it uses as much as digits as its factorization.

1244406135761 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 483840, while the sum is 44.

The spelling of 1244406135761 in words is "one trillion, two hundred forty-four billion, four hundred six million, one hundred thirty-five thousand, seven hundred sixty-one".