238186888276221 has 16 divisors (see below), whose sum is σ = 373626491414400. Its totient is φ = 149450596565184.

The previous prime is 238186888276219. The next prime is 238186888276297. The reversal of 238186888276221 is 122672888681832.

238186888276221 is a `hidden beast` number, since 2 + 3 + 8 + 186 + 88 + 82 + 76 + 221 = 666.

It is not a de Polignac number, because 238186888276221 - 2¹ = 238186888276219 is a prime.

It is a hoax number, since the sum of its digits (72) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 238186888276221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (238186888276121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 259462840801 + ... + 259462841718.

It is an arithmetic number, because the mean of its divisors is an integer number (23351655713400).

Almost surely, 2^{238186888276221} is an apocalyptic number.

It is an amenable number.

238186888276221 is a deficient number, since it is larger than the sum of its proper divisors (135439603138179).

238186888276221 is a wasteful number, since it uses less digits than its factorization.

238186888276221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 518925682545 (or 518925682539 counting only the distinct ones).

The product of its digits is 396361728, while the sum is 72.

The spelling of 238186888276221 in words is "two hundred thirty-eight trillion, one hundred eighty-six billion, eight hundred eighty-eight million, two hundred seventy-six thousand, two hundred twenty-one".