63881563 has 8 divisors (see below), whose sum is σ = 67718160. Its totient is φ = 60053760.

The previous prime is 63881561. The next prime is 63881569. The reversal of 63881563 is 36518836.

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 63881563 - 2¹ = 63881561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63881561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18303 + ... + 21511.

It is an arithmetic number, because the mean of its divisors is an integer number (8464770).

Almost surely, 2^63881563 is an apocalyptic number.

63881563 is a deficient number, since it is larger than the sum of its proper divisors (3836597).

63881563 is a wasteful number, since it uses less digits than its factorization.

63881563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4397.

The product of its digits is 103680, while the sum is 40.

The square root of 63881563 is about 7992.5942596882. The cubic root of 63881563 is about 399.7531038871.

The spelling of 63881563 in words is "sixty-three million, eight hundred eighty-one thousand, five hundred sixty-three".