2161068256 has 12 divisors (see below), whose sum is σ = 4254603192. Its totient is φ = 1080534112.

The previous prime is 2161068223. The next prime is 2161068263. The reversal of 2161068256 is 6528601612.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33766660 + ... + 33766723.

It is an arithmetic number, because the mean of its divisors is an integer number (354550266).

Almost surely, 2^2161068256 is an apocalyptic number.

It is an amenable number.

2161068256 is a deficient number, since it is larger than the sum of its proper divisors (2093534936).

2161068256 is an equidigital number, since it uses as much as digits as its factorization.

2161068256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67533393 (or 67533385 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 2161068256 is about 46487.2913386013. The cubic root of 2161068256 is about 1292.8738796190.

Adding to 2161068256 its reverse (6528601612), we get a palindrome (8689669868).

The spelling of 2161068256 in words is "two billion, one hundred sixty-one million, sixty-eight thousand, two hundred fifty-six".