63964855 has 4 divisors (see below), whose sum is σ = 76757832. Its totient is φ = 51171880.

The previous prime is 63964843. The next prime is 63964867. The reversal of 63964855 is 55846936.

63964855 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (63964843) and next prime (63964867).

It is not a de Polignac number, because 63964855 - 2¹¹ = 63962807 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 6396481 + ... + 6396490.

It is an arithmetic number, because the mean of its divisors is an integer number (19189458).

Almost surely, 2^63964855 is an apocalyptic number.

63964855 is a deficient number, since it is larger than the sum of its proper divisors (12792977).

63964855 is a wasteful number, since it uses less digits than its factorization.

63964855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12792976.

The product of its digits is 777600, while the sum is 46.

The square root of 63964855 is about 7997.8031358617. The cubic root of 63964855 is about 399.9267678434.

The spelling of 63964855 in words is "sixty-three million, nine hundred sixty-four thousand, eight hundred fifty-five".