68468181 has 16 divisors (see below), whose sum is σ = 94499328. Its totient is φ = 44049600.

The previous prime is 68468177. The next prime is 68468189. The reversal of 68468181 is 18186486.

It is not a de Polignac number, because 68468181 - 2² = 68468177 is a prime.

It is a super-2 number, since 2×68468181² = 9375783618897522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68468189) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42075 + ... + 43671.

It is an arithmetic number, because the mean of its divisors is an integer number (5906208).

Almost surely, 2^68468181 is an apocalyptic number.

It is an amenable number.

68468181 is a deficient number, since it is larger than the sum of its proper divisors (26031147).

68468181 is a wasteful number, since it uses less digits than its factorization.

68468181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2092.

The product of its digits is 73728, while the sum is 42.

The square root of 68468181 is about 8274.5501992555. The cubic root of 68468181 is about 409.1001103969.

The spelling of 68468181 in words is "sixty-eight million, four hundred sixty-eight thousand, one hundred eighty-one".