168505226277844 has 24 divisors (see below), whose sum is σ = 303059567185760. Its totient is φ = 81933890853024.

The previous prime is 168505226277811. The next prime is 168505226277851. The reversal of 168505226277844 is 448772622505861.

It is a super-2 number, since 2×168505226277844² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 168505226277844.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 2139003294 + ... + 2139082069.

Almost surely, 2^{168505226277844} is an apocalyptic number.

It is an amenable number.

168505226277844 is a deficient number, since it is larger than the sum of its proper divisors (134554340907916).

168505226277844 is a wasteful number, since it uses less digits than its factorization.

168505226277844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4278085639 (or 4278085637 counting only the distinct ones).

The product of its (nonzero) digits is 361267200, while the sum is 67.

The spelling of 168505226277844 in words is "one hundred sixty-eight trillion, five hundred five billion, two hundred twenty-six million, two hundred seventy-seven thousand, eight hundred forty-four".