68109558 has 32 divisors (see below), whose sum is σ = 151414272. Its totient is φ = 20248800.

The previous prime is 68109553. The next prime is 68109571. The reversal of 68109558 is 85590186.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68109553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6238 + ... + 13233.

It is an arithmetic number, because the mean of its divisors is an integer number (4731696).

Almost surely, 2^68109558 is an apocalyptic number.

68109558 is an abundant number, since it is smaller than the sum of its proper divisors (83304714).

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

68109558 is a wasteful number, since it uses less digits than its factorization.

68109558 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19540.

The product of its (nonzero) digits is 86400, while the sum is 42.

The square root of 68109558 is about 8252.8515072065. The cubic root of 68109558 is about 408.3845974603.

The spelling of 68109558 in words is "sixty-eight million, one hundred nine thousand, five hundred fifty-eight".