2186408722556 has 12 divisors (see below), whose sum is σ = 3851894562600. Its totient is φ = 1085867418960.

The previous prime is 2186408722457. The next prime is 2186408722601. The reversal of 2186408722556 is 6552278046812.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1834234910 + ... + 1834236101.

It is an arithmetic number, because the mean of its divisors is an integer number (320991213550).

Almost surely, 2^{2186408722556} is an apocalyptic number.

It is an amenable number.

2186408722556 is a deficient number, since it is larger than the sum of its proper divisors (1665485840044).

2186408722556 is a wasteful number, since it uses less digits than its factorization.

2186408722556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3668471164 (or 3668471162 counting only the distinct ones).

The product of its (nonzero) digits is 12902400, while the sum is 56.

The spelling of 2186408722556 in words is "two trillion, one hundred eighty-six billion, four hundred eight million, seven hundred twenty-two thousand, five hundred fifty-six".