38818661107 has 4 divisors (see below), whose sum is σ = 38886884280. Its totient is φ = 38750437936.

The previous prime is 38818661071. The next prime is 38818661129. The reversal of 38818661107 is 70116681883.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-38818661107 is a prime.

It is a super-2 number, since 2×38818661107² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38818661137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34110733 + ... + 34111870.

It is an arithmetic number, because the mean of its divisors is an integer number (9721721070).

Almost surely, 2^38818661107 is an apocalyptic number.

38818661107 is a deficient number, since it is larger than the sum of its proper divisors (68223173).

38818661107 is an equidigital number, since it uses as much as digits as its factorization.

38818661107 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68223172.

The product of its (nonzero) digits is 387072, while the sum is 49.

The spelling of 38818661107 in words is "thirty-eight billion, eight hundred eighteen million, six hundred sixty-one thousand, one hundred seven".