2188357166838 has 16 divisors (see below), whose sum is σ = 4411176652800. Its totient is φ = 723708669096.

The previous prime is 2188357166837. The next prime is 2188357166843. The reversal of 2188357166838 is 8386617538812.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2188357166837) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1435929138 + ... + 1435930661.

It is an arithmetic number, because the mean of its divisors is an integer number (275698540800).

Almost surely, 2^{2188357166838} is an apocalyptic number.

2188357166838 is an abundant number, since it is smaller than the sum of its proper divisors (2222819485962).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2188357166838 is a wasteful number, since it uses less digits than its factorization.

2188357166838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2871859931.

The product of its digits is 92897280, while the sum is 66.

The spelling of 2188357166838 in words is "two trillion, one hundred eighty-eight billion, three hundred fifty-seven million, one hundred sixty-six thousand, eight hundred thirty-eight".