68117856 has 24 divisors (see below), whose sum is σ = 178809624. Its totient is φ = 22705920.

The previous prime is 68117849. The next prime is 68117857. The reversal of 68117856 is 65871186.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68117857) by changing a digit.

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, 354685 + ... + 354876.

It is an arithmetic number, because the mean of its divisors is an integer number (7450401).

Almost surely, 2^68117856 is an apocalyptic number.

It is an amenable number.

68117856 is an abundant number, since it is smaller than the sum of its proper divisors (110691768).

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

68117856 is a wasteful number, since it uses less digits than its factorization.

68117856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 709574 (or 709566 counting only the distinct ones).

The product of its digits is 80640, while the sum is 42.

The square root of 68117856 is about 8253.3542272218. The cubic root of 68117856 is about 408.4011817101.

The spelling of 68117856 in words is "sixty-eight million, one hundred seventeen thousand, eight hundred fifty-six".