2186123581134 has 48 divisors (see below), whose sum is σ = 4992555924720. Its totient is φ = 716761820160.

The previous prime is 2186123581133. The next prime is 2186123581153. The reversal of 2186123581134 is 4311853216812.

2186123581134 is a `hidden beast` number, since 2 + 1 + 8 + 61 + 2 + 3 + 581 + 1 + 3 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 2186123581134.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2186123581133) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36840819 + ... + 36900110.

It is an arithmetic number, because the mean of its divisors is an integer number (104011581765).

Almost surely, 2^{2186123581134} is an apocalyptic number.

2186123581134 is an abundant number, since it is smaller than the sum of its proper divisors (2806432343586).

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

2186123581134 is an equidigital number, since it uses as much as digits as its factorization.

2186123581134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73741007 (or 73740995 counting only the distinct ones).

The product of its digits is 276480, while the sum is 45.

Adding to 2186123581134 its reverse (4311853216812), we get a palindrome (6497976797946).

The spelling of 2186123581134 in words is "two trillion, one hundred eighty-six billion, one hundred twenty-three million, five hundred eighty-one thousand, one hundred thirty-four".