1068138181 has 8 divisors (see below), whose sum is σ = 1226570400. Its totient is φ = 919927440.

The previous prime is 1068138107. The next prime is 1068138209. The reversal of 1068138181 is 1818318601.

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

It is a cyclic number.

It is not a de Polignac number, because 1068138181 - 2⁹ = 1068137669 is a prime.

It is a super-2 number, since 2×1068138181² = 2281838347419977522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1068138181.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1068135181) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2555146 + ... + 2555563.

It is an arithmetic number, because the mean of its divisors is an integer number (153321300).

Almost surely, 2^1068138181 is an apocalyptic number.

1068138181 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1068138181 is a deficient number, since it is larger than the sum of its proper divisors (158432219).

1068138181 is a wasteful number, since it uses less digits than its factorization.

1068138181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5110739.

The product of its (nonzero) digits is 9216, while the sum is 37.

The square root of 1068138181 is about 32682.3833433243. The cubic root of 1068138181 is about 1022.2155420120.

The spelling of 1068138181 in words is "one billion, sixty-eight million, one hundred thirty-eight thousand, one hundred eighty-one".