171849440054 has 4 divisors (see below), whose sum is σ = 257774160084. Its totient is φ = 85924720026.

The previous prime is 171849440033. The next prime is 171849440089. The reversal of 171849440054 is 450044948171.

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

It is a junction number, because it is equal to n+sod(n) for n = 171849439990 and 171849440008.

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, 42962360012 + ... + 42962360015.

It is an arithmetic number, because the mean of its divisors is an integer number (64443540021).

Almost surely, 2^171849440054 is an apocalyptic number.

171849440054 is a deficient number, since it is larger than the sum of its proper divisors (85924720030).

171849440054 is an equidigital number, since it uses as much as digits as its factorization.

171849440054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85924720029.

The product of its (nonzero) digits is 645120, while the sum is 47.

The spelling of 171849440054 in words is "one hundred seventy-one billion, eight hundred forty-nine million, four hundred forty thousand, fifty-four".