238818383161 has 4 divisors (see below), whose sum is σ = 240137821924. Its totient is φ = 237498944400.

The previous prime is 238818383123. The next prime is 238818383171. The reversal of 238818383161 is 161383818832.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 9694371600 + 229124011561 = 98460^2 + 478669^2 .

It is a cyclic number.

It is not a de Polignac number, because 238818383161 - 2¹³ = 238818374969 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 238818383099 and 238818383108.

It is not an unprimeable number, because it can be changed into a prime (238818383171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 659719110 + ... + 659719471.

It is an arithmetic number, because the mean of its divisors is an integer number (60034455481).

Almost surely, 2^238818383161 is an apocalyptic number.

It is an amenable number.

238818383161 is a deficient number, since it is larger than the sum of its proper divisors (1319438763).

238818383161 is a wasteful number, since it uses less digits than its factorization.

238818383161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1319438762.

The product of its digits is 1327104, while the sum is 52.

The spelling of 238818383161 in words is "two hundred thirty-eight billion, eight hundred eighteen million, three hundred eighty-three thousand, one hundred sixty-one".