2189869957138 has 8 divisors (see below), whose sum is σ = 3285779376240. Its totient is φ = 1094610165060.

The previous prime is 2189869957133. The next prime is 2189869957151. The reversal of 2189869957138 is 8317599689812.

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

It is not an unprimeable number, because it can be changed into a prime (2189869957133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 162398328 + ... + 162411811.

It is an arithmetic number, because the mean of its divisors is an integer number (410722422030).

Almost surely, 2^{2189869957138} is an apocalyptic number.

2189869957138 is a deficient number, since it is larger than the sum of its proper divisors (1095909419102).

2189869957138 is a wasteful number, since it uses less digits than its factorization.

2189869957138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324813512.

The product of its digits is 470292480, while the sum is 76.

The spelling of 2189869957138 in words is "two trillion, one hundred eighty-nine billion, eight hundred sixty-nine million, nine hundred fifty-seven thousand, one hundred thirty-eight".