2186676649 has 4 divisors (see below), whose sum is σ = 2192635264. Its totient is φ = 2180718036.

The previous prime is 2186676643. The next prime is 2186676691. The reversal of 2186676649 is 9466766812.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2186676649 - 2²¹ = 2184579497 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2186676649.

It is not an unprimeable number, because it can be changed into a prime (2186676643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2978757 + ... + 2979490.

It is an arithmetic number, because the mean of its divisors is an integer number (548158816).

Almost surely, 2^2186676649 is an apocalyptic number.

It is an amenable number.

2186676649 is a deficient number, since it is larger than the sum of its proper divisors (5958615).

2186676649 is an equidigital number, since it uses as much as digits as its factorization.

2186676649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5958614.

The product of its digits is 5225472, while the sum is 55.

The square root of 2186676649 is about 46761.9145138434. The cubic root of 2186676649 is about 1297.9606385405.

The spelling of 2186676649 in words is "two billion, one hundred eighty-six million, six hundred seventy-six thousand, six hundred forty-nine".