2161842386 has 12 divisors (see below), whose sum is σ = 3564360366. Its totient is φ = 982655520.

The previous prime is 2161842373. The next prime is 2161842407. The reversal of 2161842386 is 6832481612.

It can be written as a sum of positive squares in only one way, i.e., 2105066161 + 56776225 = 45881^2 + 7535^2 .

It is an unprimeable number.

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 in 5 ways as a sum of consecutive naturals, for example, 4466375 + ... + 4466858.

Almost surely, 2^2161842386 is an apocalyptic number.

2161842386 is a deficient number, since it is larger than the sum of its proper divisors (1402517980).

2161842386 is a wasteful number, since it uses less digits than its factorization.

2161842386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8933257 (or 8933246 counting only the distinct ones).

The product of its digits is 110592, while the sum is 41.

The square root of 2161842386 is about 46495.6168471825. The cubic root of 2161842386 is about 1293.0282373801.

The spelling of 2161842386 in words is "two billion, one hundred sixty-one million, eight hundred forty-two thousand, three hundred eighty-six".