2188506136 has 8 divisors (see below), whose sum is σ = 4103449020. Its totient is φ = 1094253064.

The previous prime is 2188506121. The next prime is 2188506139. The reversal of 2188506136 is 6316058812.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2188506139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 136781626 + ... + 136781641.

Almost surely, 2^2188506136 is an apocalyptic number.

It is an amenable number.

2188506136 is a deficient number, since it is larger than the sum of its proper divisors (1914942884).

2188506136 is a wasteful number, since it uses less digits than its factorization.

2188506136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273563273 (or 273563269 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 40.

The square root of 2188506136 is about 46781.4721444291. The cubic root of 2188506136 is about 1298.3225180141.

The spelling of 2188506136 in words is "two billion, one hundred eighty-eight million, five hundred six thousand, one hundred thirty-six".