17121145742 has 4 divisors (see below), whose sum is σ = 25681718616. Its totient is φ = 8560572870.

The previous prime is 17121145711. The next prime is 17121145751. The reversal of 17121145742 is 24754112171.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4280286434 + ... + 4280286437.

It is an arithmetic number, because the mean of its divisors is an integer number (6420429654).

Almost surely, 2^17121145742 is an apocalyptic number.

17121145742 is a deficient number, since it is larger than the sum of its proper divisors (8560572874).

17121145742 is an equidigital number, since it uses as much as digits as its factorization.

17121145742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8560572873.

The product of its digits is 15680, while the sum is 35.

The spelling of 17121145742 in words is "seventeen billion, one hundred twenty-one million, one hundred forty-five thousand, seven hundred forty-two".