68156768 has 24 divisors (see below), whose sum is σ = 137041632. Its totient is φ = 33352576.

The previous prime is 68156761. The next prime is 68156773. The reversal of 68156768 is 86765186.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68156761) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21155 + ... + 24162.

It is an arithmetic number, because the mean of its divisors is an integer number (5710068).

Almost surely, 2^68156768 is an apocalyptic number.

It is an amenable number.

68156768 is an abundant number, since it is smaller than the sum of its proper divisors (68884864).

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

68156768 is a wasteful number, since it uses less digits than its factorization.

68156768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45374 (or 45366 counting only the distinct ones).

The product of its digits is 483840, while the sum is 47.

The square root of 68156768 is about 8255.7112352601. The cubic root of 68156768 is about 408.4789326488.

The spelling of 68156768 in words is "sixty-eight million, one hundred fifty-six thousand, seven hundred sixty-eight".