168978192243 has 128 divisors (see below), whose sum is σ = 275208536064. Its totient is φ = 90226483200.

The previous prime is 168978192233. The next prime is 168978192283. The reversal of 168978192243 is 342291879861.

It is not a de Polignac number, because 168978192243 - 2⁵ = 168978192211 is a prime.

It is not an unprimeable number, because it can be changed into a prime (168978192233) by changing a digit.

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 127 ways as a sum of consecutive naturals, for example, 757749630 + ... + 757749852.

It is an arithmetic number, because the mean of its divisors is an integer number (2150066688).

Almost surely, 2^168978192243 is an apocalyptic number.

168978192243 is a deficient number, since it is larger than the sum of its proper divisors (106230343821).

168978192243 is a wasteful number, since it uses less digits than its factorization.

168978192243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 625.

The product of its digits is 10450944, while the sum is 60.

The spelling of 168978192243 in words is "one hundred sixty-eight billion, nine hundred seventy-eight million, one hundred ninety-two thousand, two hundred forty-three".