63975655 has 4 divisors (see below), whose sum is σ = 76770792. Its totient is φ = 51180520.

The previous prime is 63975649. The next prime is 63975689. The reversal of 63975655 is 55657936.

63975655 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 not a de Polignac number, because 63975655 - 2⁵ = 63975623 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, 6397561 + ... + 6397570.

It is an arithmetic number, because the mean of its divisors is an integer number (19192698).

Almost surely, 2^63975655 is an apocalyptic number.

63975655 is a deficient number, since it is larger than the sum of its proper divisors (12795137).

63975655 is a wasteful number, since it uses less digits than its factorization.

63975655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12795136.

The product of its digits is 850500, while the sum is 46.

The square root of 63975655 is about 7998.4782927754. The cubic root of 63975655 is about 399.9492748177.

The spelling of 63975655 in words is "sixty-three million, nine hundred seventy-five thousand, six hundred fifty-five".