68159984 has 20 divisors (see below), whose sum is σ = 132535416. Its totient is φ = 33957312.

The previous prime is 68159983. The next prime is 68160019. The reversal of 68159984 is 48995186.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68159981) 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, 2999 + ... + 12054.

Almost surely, 2^68159984 is an apocalyptic number.

It is an amenable number.

68159984 is a deficient number, since it is larger than the sum of its proper divisors (64375432).

68159984 is a wasteful number, since it uses less digits than its factorization.

68159984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15344 (or 15338 counting only the distinct ones).

The product of its digits is 622080, while the sum is 50.

The square root of 68159984 is about 8255.9060072169. The cubic root of 68159984 is about 408.4853572863.

The spelling of 68159984 in words is "sixty-eight million, one hundred fifty-nine thousand, nine hundred eighty-four".