563818881 has 16 divisors (see below), whose sum is σ = 780088320. Its totient is φ = 361961040.

The previous prime is 563818873. The next prime is 563818883. The reversal of 563818881 is 188818365.

It is not a de Polignac number, because 563818881 - 2³ = 563818873 is a prime.

It is a super-2 number, since 2×563818881² = 635783461144184322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 563818881.

It is not an unprimeable number, because it can be changed into a prime (563818883) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21621 + ... + 39938.

It is an arithmetic number, because the mean of its divisors is an integer number (48755520).

Almost surely, 2^563818881 is an apocalyptic number.

It is an amenable number.

563818881 is a deficient number, since it is larger than the sum of its proper divisors (216269439).

563818881 is a wasteful number, since it uses less digits than its factorization.

563818881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61676.

The product of its digits is 368640, while the sum is 48.

The square root of 563818881 is about 23744.8706250424. The cubic root of 563818881 is about 826.1264714780.

The spelling of 563818881 in words is "five hundred sixty-three million, eight hundred eighteen thousand, eight hundred eighty-one".