2188638856285 has 8 divisors (see below), whose sum is σ = 3001561860096. Its totient is φ = 1500780930000.

The previous prime is 2188638856241. The next prime is 2188638856331. The reversal of 2188638856285 is 5826588368812.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2188638856285 - 2¹³ = 2188638848093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31266269341 + ... + 31266269410.

It is an arithmetic number, because the mean of its divisors is an integer number (375195232512).

Almost surely, 2^{2188638856285} is an apocalyptic number.

It is an amenable number.

2188638856285 is a deficient number, since it is larger than the sum of its proper divisors (812923003811).

2188638856285 is an equidigital number, since it uses as much as digits as its factorization.

2188638856285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62532538763.

The product of its digits is 353894400, while the sum is 70.

The spelling of 2188638856285 in words is "two trillion, one hundred eighty-eight billion, six hundred thirty-eight million, eight hundred fifty-six thousand, two hundred eighty-five".