2256144643 has 4 divisors (see below), whose sum is σ = 2287050808. Its totient is φ = 2225238480.

The previous prime is 2256144641. The next prime is 2256144659. The reversal of 2256144643 is 3464416522.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2256144643 - 2¹ = 2256144641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2256144641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15452973 + ... + 15453118.

It is an arithmetic number, because the mean of its divisors is an integer number (571762702).

Almost surely, 2^2256144643 is an apocalyptic number.

2256144643 is a deficient number, since it is larger than the sum of its proper divisors (30906165).

2256144643 is an equidigital number, since it uses as much as digits as its factorization.

2256144643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30906164.

The product of its digits is 138240, while the sum is 37.

The square root of 2256144643 is about 47498.8909660005. The cubic root of 2256144643 is about 1311.5624662265.

The spelling of 2256144643 in words is "two billion, two hundred fifty-six million, one hundred forty-four thousand, six hundred forty-three".