5257556563 has 4 divisors (see below), whose sum is σ = 6008636080. Its totient is φ = 4506477048.

The previous prime is 5257556533. The next prime is 5257556581. The reversal of 5257556563 is 3656557525.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5257556563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5257556503) 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, 375539748 + ... + 375539761.

It is an arithmetic number, because the mean of its divisors is an integer number (1502159020).

Almost surely, 2^5257556563 is an apocalyptic number.

5257556563 is a deficient number, since it is larger than the sum of its proper divisors (751079517).

5257556563 is an equidigital number, since it uses as much as digits as its factorization.

5257556563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 751079516.

The product of its digits is 4725000, while the sum is 49.

The square root of 5257556563 is about 72509.0102194203. The cubic root of 5257556563 is about 1738.8467898102.

The spelling of 5257556563 in words is "five billion, two hundred fifty-seven million, five hundred fifty-six thousand, five hundred sixty-three".