238863105855 has 72 divisors (see below), whose sum is σ = 455319590544. Its totient is φ = 115754031360.

The previous prime is 238863105853. The next prime is 238863105917. The reversal of 238863105855 is 558501368832.

It is a happy number.

238863105855 is a `hidden beast` number, since 23 + 8 + 8 + 6 + 31 + 0 + 585 + 5 = 666.

It is not a de Polignac number, because 238863105855 - 2¹ = 238863105853 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (238863105853) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 11985379 + ... + 12005291.

It is an arithmetic number, because the mean of its divisors is an integer number (6323883202).

Almost surely, 2^238863105855 is an apocalyptic number.

238863105855 is a deficient number, since it is larger than the sum of its proper divisors (216456484689).

238863105855 is a wasteful number, since it uses less digits than its factorization.

238863105855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22149 (or 22135 counting only the distinct ones).

The product of its (nonzero) digits is 6912000, while the sum is 54.

The spelling of 238863105855 in words is "two hundred thirty-eight billion, eight hundred sixty-three million, one hundred five thousand, eight hundred fifty-five".