63135978 has 16 divisors (see below), whose sum is σ = 126437760. Its totient is φ = 21017696.

The previous prime is 63135973. The next prime is 63135991. The reversal of 63135978 is 87953136.

63135978 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (63135971) 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 7 ways as a sum of consecutive naturals, for example, 1650 + ... + 11357.

It is an arithmetic number, because the mean of its divisors is an integer number (7902360).

Almost surely, 2^63135978 is an apocalyptic number.

63135978 is an abundant number, since it is smaller than the sum of its proper divisors (63301782).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

63135978 is a wasteful number, since it uses less digits than its factorization.

63135978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13821.

The product of its digits is 136080, while the sum is 42.

The square root of 63135978 is about 7945.8151249573. The cubic root of 63135978 is about 398.1917924472.

The spelling of 63135978 in words is "sixty-three million, one hundred thirty-five thousand, nine hundred seventy-eight".