68181826 has 8 divisors (see below), whose sum is σ = 102328380. Its totient is φ = 34072368.

The previous prime is 68181809. The next prime is 68181829. The reversal of 68181826 is 62818186.

It can be written as a sum of positive squares in 2 ways, for example, as 63186601 + 4995225 = 7949^2 + 2235^2 .

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

It is a super-2 number, since 2×68181826² = 9297522793388552, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (68181829) 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, 4101 + ... + 12376.

Almost surely, 2^68181826 is an apocalyptic number.

68181826 is a deficient number, since it is larger than the sum of its proper divisors (34146554).

68181826 is a wasteful number, since it uses less digits than its factorization.

68181826 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18548.

The product of its digits is 36864, while the sum is 40.

The square root of 68181826 is about 8257.2287118621. The cubic root of 68181826 is about 408.5289859365.

The spelling of 68181826 in words is "sixty-eight million, one hundred eighty-one thousand, eight hundred twenty-six".