168171964 has 24 divisors (see below), whose sum is σ = 310326800. Its totient is φ = 79522560.

The previous prime is 168171953. The next prime is 168171967. The reversal of 168171964 is 469171861.

It is a self number, because there is not a number n which added to its sum of digits gives 168171964.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168171967) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52324 + ... + 55444.

Almost surely, 2^168171964 is an apocalyptic number.

It is an amenable number.

168171964 is a deficient number, since it is larger than the sum of its proper divisors (142154836).

168171964 is a wasteful number, since it uses less digits than its factorization.

168171964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3853 (or 3851 counting only the distinct ones).

The product of its digits is 72576, while the sum is 43.

The square root of 168171964 is about 12968.1133554577. The cubic root of 168171964 is about 551.9730391859.

It can be divided in two parts, 16817 and 1964, that added together give a palindrome (18781).

The spelling of 168171964 in words is "one hundred sixty-eight million, one hundred seventy-one thousand, nine hundred sixty-four".