2071645256 has 8 divisors (see below), whose sum is σ = 3884334870. Its totient is φ = 1035822624.

The previous prime is 2071645201. The next prime is 2071645307. The reversal of 2071645256 is 6525461702.

It can be written as a sum of positive squares in only one way, i.e., 1877488900 + 194156356 = 43330^2 + 13934^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 129477821 + ... + 129477836.

Almost surely, 2^2071645256 is an apocalyptic number.

It is an amenable number.

2071645256 is a deficient number, since it is larger than the sum of its proper divisors (1812689614).

2071645256 is a wasteful number, since it uses less digits than its factorization.

2071645256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258955663 (or 258955659 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 38.

The square root of 2071645256 is about 45515.3299010344. The cubic root of 2071645256 is about 1274.7894576864.

The spelling of 2071645256 in words is "two billion, seventy-one million, six hundred forty-five thousand, two hundred fifty-six".