63557543563 has 4 divisors (see below), whose sum is σ = 63576389968. Its totient is φ = 63538697160.

The previous prime is 63557543477. The next prime is 63557543593. The reversal of 63557543563 is 36534575536.

63557543563 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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-63557543563 is a prime.

It is a super-2 number, since 2×63557543563² (a number of 22 digits) contains 22 as substring.

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 63557543563.

It is not an unprimeable number, because it can be changed into a prime (63557543593) 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, 9418143 + ... + 9424888.

It is an arithmetic number, because the mean of its divisors is an integer number (15894097492).

Almost surely, 2^63557543563 is an apocalyptic number.

63557543563 is a deficient number, since it is larger than the sum of its proper divisors (18846405).

63557543563 is a wasteful number, since it uses less digits than its factorization.

63557543563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18846404.

The product of its digits is 17010000, while the sum is 52.

The spelling of 63557543563 in words is "sixty-three billion, five hundred fifty-seven million, five hundred forty-three thousand, five hundred sixty-three".