63649735128 has 48 divisors (see below), whose sum is σ = 197011086480. Its totient is φ = 18185638464.

The previous prime is 63649735117. The next prime is 63649735129. The reversal of 63649735128 is 82153794636.

63649735128 is a `hidden beast` number, since 6 + 36 + 4 + 97 + 3 + 512 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63649735129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 63144075 + ... + 63145082.

It is an arithmetic number, because the mean of its divisors is an integer number (4104397635).

Almost surely, 2^63649735128 is an apocalyptic number.

It is an amenable number.

63649735128 is an abundant number, since it is smaller than the sum of its proper divisors (133361351352).

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

63649735128 is a wasteful number, since it uses less digits than its factorization.

63649735128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126289176 (or 126289169 counting only the distinct ones).

The product of its digits is 6531840, while the sum is 54.

The spelling of 63649735128 in words is "sixty-three billion, six hundred forty-nine million, seven hundred thirty-five thousand, one hundred twenty-eight".