63009681 has 32 divisors (see below), whose sum is σ = 102620160. Its totient is φ = 33587136.

The previous prime is 63009679. The next prime is 63009697. The reversal of 63009681 is 18690036.

63009681 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 63009681 - 2¹ = 63009679 is a prime.

It is a super-2 number, since 2×63009681² = 7940439799443522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (63009641) 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 31 ways as a sum of consecutive naturals, for example, 25555 + ... + 27911.

It is an arithmetic number, because the mean of its divisors is an integer number (3206880).

Almost surely, 2^63009681 is an apocalyptic number.

It is an amenable number.

63009681 is a deficient number, since it is larger than the sum of its proper divisors (39610479).

63009681 is a wasteful number, since it uses less digits than its factorization.

63009681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2453.

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 63009681 is about 7937.8637554445. The cubic root of 63009681 is about 397.9261013610.

The spelling of 63009681 in words is "sixty-three million, nine thousand, six hundred eighty-one".