238693403155 has 4 divisors (see below), whose sum is σ = 286432083792. Its totient is φ = 190954722520.

The previous prime is 238693403147. The next prime is 238693403171. The reversal of 238693403155 is 551304396832.

238693403155 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 238693403155 - 2³ = 238693403147 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 238693403099 and 238693403108.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23869340311 + ... + 23869340320.

It is an arithmetic number, because the mean of its divisors is an integer number (71608020948).

Almost surely, 2^238693403155 is an apocalyptic number.

238693403155 is a deficient number, since it is larger than the sum of its proper divisors (47738680637).

238693403155 is an equidigital number, since it uses as much as digits as its factorization.

238693403155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47738680636.

The product of its (nonzero) digits is 2332800, while the sum is 49.

Adding to 238693403155 its reverse (551304396832), we get a palindrome (789997799987).

The spelling of 238693403155 in words is "two hundred thirty-eight billion, six hundred ninety-three million, four hundred three thousand, one hundred fifty-five".