168400616 has 16 divisors (see below), whose sum is σ = 324285540. Its totient is φ = 81924480.

The previous prime is 168400607. The next prime is 168400621. The reversal of 168400616 is 616004861.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 142898116 + 25502500 = 11954^2 + 5050^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 284165 + ... + 284756.

Almost surely, 2^168400616 is an apocalyptic number.

It is an amenable number.

168400616 is a deficient number, since it is larger than the sum of its proper divisors (155884924).

168400616 is a wasteful number, since it uses less digits than its factorization.

168400616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 568964 (or 568960 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 168400616 is about 12976.9262924623. The cubic root of 168400616 is about 552.2230859831.

The spelling of 168400616 in words is "one hundred sixty-eight million, four hundred thousand, six hundred sixteen".