4256740643 has 4 divisors (see below), whose sum is σ = 4278796488. Its totient is φ = 4234684800.

The previous prime is 4256740589. The next prime is 4256740651. The reversal of 4256740643 is 3460476524.

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 4256740643 - 2¹⁴ = 4256724259 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4256740643.

It is not an unprimeable number, because it can be changed into a prime (4256740693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11027633 + ... + 11028018.

It is an arithmetic number, because the mean of its divisors is an integer number (1069699122).

Almost surely, 2^4256740643 is an apocalyptic number.

4256740643 is a deficient number, since it is larger than the sum of its proper divisors (22055845).

4256740643 is a wasteful number, since it uses less digits than its factorization.

4256740643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22055844.

The product of its (nonzero) digits is 483840, while the sum is 41.

The square root of 4256740643 is about 65243.7019412602. The cubic root of 4256740643 is about 1620.6618038544.

The spelling of 4256740643 in words is "four billion, two hundred fifty-six million, seven hundred forty thousand, six hundred forty-three".