173166278042 has 4 divisors (see below), whose sum is σ = 259749417066. Its totient is φ = 86583139020.

The previous prime is 173166278041. The next prime is 173166278059. The reversal of 173166278042 is 240872661371.

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., 157219387081 + 15946890961 = 396509^2 + 126281^2 .

It is not an unprimeable number, because it can be changed into a prime (173166278041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43291569509 + ... + 43291569512.

Almost surely, 2^173166278042 is an apocalyptic number.

173166278042 is a deficient number, since it is larger than the sum of its proper divisors (86583139024).

173166278042 is an equidigital number, since it uses as much as digits as its factorization.

173166278042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86583139023.

The product of its (nonzero) digits is 677376, while the sum is 47.

The spelling of 173166278042 in words is "one hundred seventy-three billion, one hundred sixty-six million, two hundred seventy-eight thousand, forty-two".