168502401 has 6 divisors (see below), whose sum is σ = 243392370. Its totient is φ = 112334928.

The previous prime is 168502381. The next prime is 168502417. The reversal of 168502401 is 104205861.

It can be written as a sum of positive squares in only one way, i.e., 116316225 + 52186176 = 10785^2 + 7224^2 .

It is not a de Polignac number, because 168502401 - 2⁹ = 168501889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (168502421) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9361236 + ... + 9361253.

It is an arithmetic number, because the mean of its divisors is an integer number (40565395).

Almost surely, 2^168502401 is an apocalyptic number.

It is an amenable number.

168502401 is a deficient number, since it is larger than the sum of its proper divisors (74889969).

168502401 is a wasteful number, since it uses less digits than its factorization.

168502401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18722495 (or 18722492 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 168502401 is about 12980.8474684822. The cubic root of 168502401 is about 552.3343221283.

The spelling of 168502401 in words is "one hundred sixty-eight million, five hundred two thousand, four hundred one".