168512072 has 8 divisors (see below), whose sum is σ = 315960150. Its totient is φ = 84256032.

The previous prime is 168512051. The next prime is 168512089. The reversal of 168512072 is 270215861.

It can be written as a sum of positive squares in only one way, i.e., 162970756 + 5541316 = 12766^2 + 2354^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10531997 + ... + 10532012.

Almost surely, 2^168512072 is an apocalyptic number.

It is an amenable number.

168512072 is a deficient number, since it is larger than the sum of its proper divisors (147448078).

168512072 is a wasteful number, since it uses less digits than its factorization.

168512072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21064015 (or 21064011 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 32.

The square root of 168512072 is about 12981.2199734848. The cubic root of 168512072 is about 552.3448887889.

The spelling of 168512072 in words is "one hundred sixty-eight million, five hundred twelve thousand, seventy-two".