63905946636 has 48 divisors (see below), whose sum is σ = 170522132480. Its totient is φ = 18247455360.

The previous prime is 63905946589. The next prime is 63905946659. The reversal of 63905946636 is 63664950936.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 101260 + ... + 371571.

Almost surely, 2^63905946636 is an apocalyptic number.

It is an amenable number.

63905946636 is an abundant number, since it is smaller than the sum of its proper divisors (106616185844).

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

63905946636 is a wasteful number, since it uses less digits than its factorization.

63905946636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 474454 (or 474452 counting only the distinct ones).

The product of its (nonzero) digits is 18895680, while the sum is 57.

The spelling of 63905946636 in words is "sixty-three billion, nine hundred five million, nine hundred forty-six thousand, six hundred thirty-six".