1742279984609 has 2 divisors, whose sum is σ = 1742279984610. Its totient is φ = 1742279984608.

The previous prime is 1742279984563. The next prime is 1742279984777. The reversal of 1742279984609 is 9064899722471.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1219926877009 + 522353107600 = 1104503^2 + 722740^2 .

It is a cyclic number.

It is not a de Polignac number, because 1742279984609 - 2²⁸ = 1742011549153 is a prime.

It is not a weakly prime, because it can be changed into another prime (1742279984509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 871139992304 + 871139992305.

It is an arithmetic number, because the mean of its divisors is an integer number (871139992305).

Almost surely, 2^{1742279984609} is an apocalyptic number.

It is an amenable number.

1742279984609 is a deficient number, since it is larger than the sum of its proper divisors (1).

1742279984609 is an equidigital number, since it uses as much as digits as its factorization.

1742279984609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 109734912, while the sum is 68.

The spelling of 1742279984609 in words is "one trillion, seven hundred forty-two billion, two hundred seventy-nine million, nine hundred eighty-four thousand, six hundred nine".