2189564569381 has 16 divisors (see below), whose sum is σ = 2536813062400. Its totient is φ = 1850933006208.

The previous prime is 2189564569363. The next prime is 2189564569393. The reversal of 2189564569381 is 1839654659812.

It is a cyclic number.

It is not a de Polignac number, because 2189564569381 - 2³³ = 2180974634789 is a prime.

It is a super-2 number, since 2×2189564569381² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2189564561381) 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, 7688155 + ... + 7967863.

It is an arithmetic number, because the mean of its divisors is an integer number (158550816400).

Almost surely, 2^{2189564569381} is an apocalyptic number.

It is an amenable number.

2189564569381 is a deficient number, since it is larger than the sum of its proper divisors (347248493019).

2189564569381 is a wasteful number, since it uses less digits than its factorization.

2189564569381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295108.

The product of its digits is 111974400, while the sum is 67.

The spelling of 2189564569381 in words is "two trillion, one hundred eighty-nine billion, five hundred sixty-four million, five hundred sixty-nine thousand, three hundred eighty-one".