68161816 has 32 divisors (see below), whose sum is σ = 137084400. Its totient is φ = 31674240.

The previous prime is 68161801. The next prime is 68161843. The reversal of 68161816 is 61816186.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3826 + ... + 12286.

Almost surely, 2^68161816 is an apocalyptic number.

It is an amenable number.

68161816 is an abundant number, since it is smaller than the sum of its proper divisors (68922584).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

68161816 is a wasteful number, since it uses less digits than its factorization.

68161816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8539 (or 8535 counting only the distinct ones).

The product of its digits is 13824, while the sum is 37.

The square root of 68161816 is about 8256.0169573469. The cubic root of 68161816 is about 408.4890170019.

The spelling of 68161816 in words is "sixty-eight million, one hundred sixty-one thousand, eight hundred sixteen".