63881145 has 24 divisors (see below), whose sum is σ = 110916936. Its totient is φ = 34011648.

The previous prime is 63881137. The next prime is 63881149. The reversal of 63881145 is 54118836.

63881145 is a `hidden beast` number, since 638 + 8 + 1 + 14 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 39200121 + 24681024 = 6261^2 + 4968^2 .

It is not a de Polignac number, because 63881145 - 2³ = 63881137 is a prime.

It is a super-3 number, since 3×63881145³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (63881149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 43239 + ... + 44691.

It is an arithmetic number, because the mean of its divisors is an integer number (4621539).

Almost surely, 2^63881145 is an apocalyptic number.

It is an amenable number.

63881145 is a deficient number, since it is larger than the sum of its proper divisors (47035791).

63881145 is a wasteful number, since it uses less digits than its factorization.

63881145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2441 (or 2438 counting only the distinct ones).

The product of its digits is 23040, while the sum is 36.

The square root of 63881145 is about 7992.5681104386. The cubic root of 63881145 is about 399.7522319759.

The spelling of 63881145 in words is "sixty-three million, eight hundred eighty-one thousand, one hundred forty-five".