171755754101242 has 4 divisors (see below), whose sum is σ = 257633631151866. Its totient is φ = 85877877050620.

The previous prime is 171755754101213. The next prime is 171755754101279. The reversal of 171755754101242 is 242101457557171.

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

It can be written as a sum of positive squares in only one way, i.e., 150814339861201 + 20941414240041 = 12280649^2 + 4576179^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 171755754101242.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42938938525309 + ... + 42938938525312.

Almost surely, 2^{171755754101242} is an apocalyptic number.

171755754101242 is a deficient number, since it is larger than the sum of its proper divisors (85877877050624).

171755754101242 is an equidigital number, since it uses as much as digits as its factorization.

171755754101242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85877877050623.

The product of its (nonzero) digits is 2744000, while the sum is 52.

The spelling of 171755754101242 in words is "one hundred seventy-one trillion, seven hundred fifty-five billion, seven hundred fifty-four million, one hundred one thousand, two hundred forty-two".