68816181 has 8 divisors (see below), whose sum is σ = 104862784. Its totient is φ = 39323520.

The previous prime is 68816179. The next prime is 68816183. The reversal of 68816181 is 18161886.

It is an interprime number because it is at equal distance from previous prime (68816179) and next prime (68816183).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 68816181 - 2¹ = 68816179 is a prime.

It is a super-2 number, since 2×68816181² = 9471333534849522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68816183) 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 7 ways as a sum of consecutive naturals, for example, 1638460 + ... + 1638501.

It is an arithmetic number, because the mean of its divisors is an integer number (13107848).

Almost surely, 2^68816181 is an apocalyptic number.

It is an amenable number.

68816181 is a deficient number, since it is larger than the sum of its proper divisors (36046603).

68816181 is a wasteful number, since it uses less digits than its factorization.

68816181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3276971.

The product of its digits is 18432, while the sum is 39.

The square root of 68816181 is about 8295.5518803754. The cubic root of 68816181 is about 409.7920440548.

The spelling of 68816181 in words is "sixty-eight million, eight hundred sixteen thousand, one hundred eighty-one".