2256647645 has 32 divisors (see below), whose sum is σ = 3233710080. Its totient is φ = 1478157120.

The previous prime is 2256647587. The next prime is 2256647663. The reversal of 2256647645 is 5467466522.

2256647645 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2256647645 - 2⁶ = 2256647581 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2256647645.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 828596 + ... + 831314.

It is an arithmetic number, because the mean of its divisors is an integer number (101053440).

Almost surely, 2^2256647645 is an apocalyptic number.

It is an amenable number.

2256647645 is a deficient number, since it is larger than the sum of its proper divisors (977062435).

2256647645 is a wasteful number, since it uses less digits than its factorization.

2256647645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3785.

The product of its digits is 2419200, while the sum is 47.

The square root of 2256647645 is about 47504.1855524332. The cubic root of 2256647645 is about 1311.6599288787.

The spelling of 2256647645 in words is "two billion, two hundred fifty-six million, six hundred forty-seven thousand, six hundred forty-five".