63786561 has 16 divisors (see below), whose sum is σ = 88657920. Its totient is φ = 40746960.

The previous prime is 63786559. The next prime is 63786563. The reversal of 63786561 is 16568736.

63786561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (63786559) and next prime (63786563).

It is not a de Polignac number, because 63786561 - 2¹ = 63786559 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (63786563) 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 15 ways as a sum of consecutive naturals, for example, 6250 + ... + 12908.

It is an arithmetic number, because the mean of its divisors is an integer number (5541120).

Almost surely, 2^63786561 is an apocalyptic number.

It is an amenable number.

63786561 is a deficient number, since it is larger than the sum of its proper divisors (24871359).

63786561 is a wasteful number, since it uses less digits than its factorization.

63786561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6796.

The product of its digits is 181440, while the sum is 42.

The square root of 63786561 is about 7986.6489217944. The cubic root of 63786561 is about 399.5548401823.

The spelling of 63786561 in words is "sixty-three million, seven hundred eighty-six thousand, five hundred sixty-one".