1742279984639 has 4 divisors (see below), whose sum is σ = 1742286704256. Its totient is φ = 1742273265024.

The previous prime is 1742279984609. The next prime is 1742279984777. The reversal of 1742279984639 is 9364899722471.

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

It is a cyclic number.

It is not a de Polignac number, because 1742279984639 - 2⁸ = 1742279984383 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1742279984609) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2954594 + ... + 3494879.

It is an arithmetic number, because the mean of its divisors is an integer number (435571676064).

Almost surely, 2^{1742279984639} is an apocalyptic number.

1742279984639 is a deficient number, since it is larger than the sum of its proper divisors (6719617).

1742279984639 is an equidigital number, since it uses as much as digits as its factorization.

1742279984639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6719616.

The product of its digits is 329204736, while the sum is 71.

The spelling of 1742279984639 in words is "one trillion, seven hundred forty-two billion, two hundred seventy-nine million, nine hundred eighty-four thousand, six hundred thirty-nine".