68445816 has 16 divisors (see below), whose sum is σ = 171114600. Its totient is φ = 22815264.

The previous prime is 68445803. The next prime is 68445827. The reversal of 68445816 is 61854486.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1425931 + ... + 1425978.

Almost surely, 2^68445816 is an apocalyptic number.

It is an amenable number.

68445816 is an abundant number, since it is smaller than the sum of its proper divisors (102668784).

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

68445816 is a wasteful number, since it uses less digits than its factorization.

68445816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2851918 (or 2851914 counting only the distinct ones).

The product of its digits is 184320, while the sum is 42.

The square root of 68445816 is about 8273.1986559009. The cubic root of 68445816 is about 409.0555616238.

The spelling of 68445816 in words is "sixty-eight million, four hundred forty-five thousand, eight hundred sixteen".