63128551912 has 8 divisors (see below), whose sum is σ = 118366034850. Its totient is φ = 31564275952.

The previous prime is 63128551891. The next prime is 63128551919. The reversal of 63128551912 is 21915582136.

It can be written as a sum of positive squares in only one way, i.e., 60322307236 + 2806244676 = 245606^2 + 52974^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (63128551919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3945534487 + ... + 3945534502.

Almost surely, 2^63128551912 is an apocalyptic number.

It is an amenable number.

63128551912 is a deficient number, since it is larger than the sum of its proper divisors (55237482938).

63128551912 is a wasteful number, since it uses less digits than its factorization.

63128551912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7891068995 (or 7891068991 counting only the distinct ones).

The product of its digits is 129600, while the sum is 43.

The spelling of 63128551912 in words is "sixty-three billion, one hundred twenty-eight million, five hundred fifty-one thousand, nine hundred twelve".