1719942142465 has 4 divisors (see below), whose sum is σ = 2063930570964. Its totient is φ = 1375953713968.

The previous prime is 1719942142433. The next prime is 1719942142487. The reversal of 1719942142465 is 5642412499171.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 876485419264 + 843456723201 = 936208^2 + 918399^2 .

It is a cyclic number.

It is not a de Polignac number, because 1719942142465 - 2⁵ = 1719942142433 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 171994214242 + ... + 171994214251.

It is an arithmetic number, because the mean of its divisors is an integer number (515982642741).

Almost surely, 2^{1719942142465} is an apocalyptic number.

It is an amenable number.

1719942142465 is a deficient number, since it is larger than the sum of its proper divisors (343988428499).

1719942142465 is an equidigital number, since it uses as much as digits as its factorization.

1719942142465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343988428498.

The product of its digits is 4354560, while the sum is 55.

The spelling of 1719942142465 in words is "one trillion, seven hundred nineteen billion, nine hundred forty-two million, one hundred forty-two thousand, four hundred sixty-five".