68256816 has 40 divisors (see below), whose sum is σ = 185613120. Its totient is φ = 21554496.

The previous prime is 68256803. The next prime is 68256833. The reversal of 68256816 is 61865286.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 36510 + ... + 38333.

It is an arithmetic number, because the mean of its divisors is an integer number (4640328).

Almost surely, 2^68256816 is an apocalyptic number.

It is an amenable number.

68256816 is an abundant number, since it is smaller than the sum of its proper divisors (117356304).

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

68256816 is a wasteful number, since it uses less digits than its factorization.

68256816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74873 (or 74867 counting only the distinct ones).

The product of its digits is 138240, while the sum is 42.

The square root of 68256816 is about 8261.7683337165. The cubic root of 68256816 is about 408.6787050320.

The spelling of 68256816 in words is "sixty-eight million, two hundred fifty-six thousand, eight hundred sixteen".