168831616 has 16 divisors (see below), whose sum is σ = 336344490. Its totient is φ = 84415744.

The previous prime is 168831599. The next prime is 168831617. The reversal of 168831616 is 616138861.

It can be written as a sum of positive squares in only one way, i.e., 151191616 + 17640000 = 12296^2 + 4200^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is a super-2 number, since 2×168831616² = 57008229122342912, which contains 22 as substring.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (168831617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 659371 + ... + 659626.

Almost surely, 2^168831616 is an apocalyptic number.

168831616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

168831616 is a deficient number, since it is larger than the sum of its proper divisors (167512874).

168831616 is an equidigital number, since it uses as much as digits as its factorization.

168831616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1319011 (or 1318999 counting only the distinct ones).

The product of its digits is 41472, while the sum is 40.

The square root of 168831616 is about 12993.5220783281. The cubic root of 168831616 is about 552.6937995972.

The spelling of 168831616 in words is "one hundred sixty-eight million, eight hundred thirty-one thousand, six hundred sixteen".