2161847312 has 10 divisors (see below), whose sum is σ = 4188579198. Its totient is φ = 1080923648.

The previous prime is 2161847287. The next prime is 2161847333. The reversal of 2161847312 is 2137481612.

It can be written as a sum of positive squares in only one way, i.e., 1784555536 + 377291776 = 42244^2 + 19424^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67557713 + ... + 67557744.

Almost surely, 2^2161847312 is an apocalyptic number.

It is an amenable number.

2161847312 is a deficient number, since it is larger than the sum of its proper divisors (2026731886).

2161847312 is a wasteful number, since it uses less digits than its factorization.

2161847312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135115465 (or 135115459 counting only the distinct ones).

The product of its digits is 16128, while the sum is 35.

The square root of 2161847312 is about 46495.6698198875. The cubic root of 2161847312 is about 1293.0292194826.

The spelling of 2161847312 in words is "two billion, one hundred sixty-one million, eight hundred forty-seven thousand, three hundred twelve".