63531377128 has 32 divisors (see below), whose sum is σ = 120327552000. Its totient is φ = 31445148672.

The previous prime is 63531377071. The next prime is 63531377149. The reversal of 63531377128 is 82177313536.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 386551 + ... + 525817.

It is an arithmetic number, because the mean of its divisors is an integer number (3760236000).

Almost surely, 2^63531377128 is an apocalyptic number.

It is an amenable number.

63531377128 is a deficient number, since it is larger than the sum of its proper divisors (56796174872).

63531377128 is a wasteful number, since it uses less digits than its factorization.

63531377128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139849 (or 139845 counting only the distinct ones).

The product of its digits is 635040, while the sum is 46.

The spelling of 63531377128 in words is "sixty-three billion, five hundred thirty-one million, three hundred seventy-seven thousand, one hundred twenty-eight".