4257561563 has 4 divisors (see below), whose sum is σ = 4259234400. Its totient is φ = 4255888728.

The previous prime is 4257561557. The next prime is 4257561569. The reversal of 4257561563 is 3651657524.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (4257561557) and next prime (4257561569).

It is a cyclic number.

It is not a de Polignac number, because 4257561563 - 2¹⁰ = 4257560539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4257561569) 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, 832595 + ... + 837692.

It is an arithmetic number, because the mean of its divisors is an integer number (1064808600).

Almost surely, 2^4257561563 is an apocalyptic number.

4257561563 is a deficient number, since it is larger than the sum of its proper divisors (1672837).

4257561563 is a wasteful number, since it uses less digits than its factorization.

4257561563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1672836.

The product of its digits is 756000, while the sum is 44.

The square root of 4257561563 is about 65249.9928199230. The cubic root of 4257561563 is about 1620.7659796611.

The spelling of 4257561563 in words is "four billion, two hundred fifty-seven million, five hundred sixty-one thousand, five hundred sixty-three".