2155605188 has 24 divisors (see below), whose sum is σ = 4192896960. Its totient is φ = 961332320.

The previous prime is 2155605169. The next prime is 2155605197. The reversal of 2155605188 is 8815065512.

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, 459848 + ... + 464511.

It is an arithmetic number, because the mean of its divisors is an integer number (174704040).

Almost surely, 2^2155605188 is an apocalyptic number.

It is an amenable number.

2155605188 is a deficient number, since it is larger than the sum of its proper divisors (2037291772).

2155605188 is a wasteful number, since it uses less digits than its factorization.

2155605188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 924427 (or 924425 counting only the distinct ones).

The product of its (nonzero) digits is 96000, while the sum is 41.

The square root of 2155605188 is about 46428.4954311466. The cubic root of 2155605188 is about 1291.7835210345.

The spelling of 2155605188 in words is "two billion, one hundred fifty-five million, six hundred five thousand, one hundred eighty-eight".