68081136 has 40 divisors (see below), whose sum is σ = 176811600. Its totient is φ = 22573056.

The previous prime is 68081131. The next prime is 68081137. The reversal of 68081136 is 63118086.

It is a junction number, because it is equal to n+sod(n) for n = 68081097 and 68081106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68081131) 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 7 ways as a sum of consecutive naturals, for example, 5590 + ... + 12938.

It is an arithmetic number, because the mean of its divisors is an integer number (4420290).

Almost surely, 2^68081136 is an apocalyptic number.

It is an amenable number.

68081136 is an abundant number, since it is smaller than the sum of its proper divisors (108730464).

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

68081136 is a wasteful number, since it uses less digits than its factorization.

68081136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7553 (or 7547 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 68081136 is about 8251.1293772429. The cubic root of 68081136 is about 408.3277834962.

The spelling of 68081136 in words is "sixty-eight million, eighty-one thousand, one hundred thirty-six".