563638381 has 8 divisors (see below), whose sum is σ = 566102880. Its totient is φ = 561180048.

The previous prime is 563638343. The next prime is 563638393. The reversal of 563638381 is 183836365.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 563638381 - 2¹⁵ = 563605613 is a prime.

It is a super-2 number, since 2×563638381² = 635376449072602322, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (563638331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 282670 + ... + 284656.

It is an arithmetic number, because the mean of its divisors is an integer number (70762860).

Almost surely, 2^563638381 is an apocalyptic number.

It is an amenable number.

563638381 is a deficient number, since it is larger than the sum of its proper divisors (2464499).

563638381 is a wasteful number, since it uses less digits than its factorization.

563638381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3083.

The product of its digits is 311040, while the sum is 43.

The square root of 563638381 is about 23741.0694999193. The cubic root of 563638381 is about 826.0383038361.

The spelling of 563638381 in words is "five hundred sixty-three million, six hundred thirty-eight thousand, three hundred eighty-one".