168136216 has 8 divisors (see below), whose sum is σ = 315255420. Its totient is φ = 84068104.

The previous prime is 168136183. The next prime is 168136231. The reversal of 168136216 is 612631861.

It is a happy number.

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

It is a nialpdrome in base 15.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10508506 + ... + 10508521.

Almost surely, 2^168136216 is an apocalyptic number.

It is an amenable number.

168136216 is a deficient number, since it is larger than the sum of its proper divisors (147119204).

168136216 is a wasteful number, since it uses less digits than its factorization.

168136216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21017033 (or 21017029 counting only the distinct ones).

The product of its digits is 10368, while the sum is 34.

The square root of 168136216 is about 12966.7349783976. The cubic root of 168136216 is about 551.9339257887.

The spelling of 168136216 in words is "one hundred sixty-eight million, one hundred thirty-six thousand, two hundred sixteen".