171458145842 has 8 divisors (see below), whose sum is σ = 257639219100. Its totient is φ = 85578406144.

The previous prime is 171458145821. The next prime is 171458145919. The reversal of 171458145842 is 248541854171.

It can be written as a sum of positive squares in 2 ways, for example, as 156136409881 + 15321735961 = 395141^2 + 123781^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75331967 + ... + 75334242.

Almost surely, 2^171458145842 is an apocalyptic number.

171458145842 is a deficient number, since it is larger than the sum of its proper divisors (86181073258).

171458145842 is a wasteful number, since it uses less digits than its factorization.

171458145842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150666780.

The product of its digits is 1433600, while the sum is 50.

The spelling of 171458145842 in words is "one hundred seventy-one billion, four hundred fifty-eight million, one hundred forty-five thousand, eight hundred forty-two".