63644832812 has 48 divisors (see below), whose sum is σ = 127192246272. Its totient is φ = 27583121280.

The previous prime is 63644832793. The next prime is 63644832847. The reversal of 63644832812 is 21823844636.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 216293 + ... + 417219.

It is an arithmetic number, because the mean of its divisors is an integer number (2649838464).

Almost surely, 2^63644832812 is an apocalyptic number.

It is an amenable number.

63644832812 is a deficient number, since it is larger than the sum of its proper divisors (63547413460).

63644832812 is a wasteful number, since it uses less digits than its factorization.

63644832812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201278 (or 201276 counting only the distinct ones).

The product of its digits is 1327104, while the sum is 47.

The spelling of 63644832812 in words is "sixty-three billion, six hundred forty-four million, eight hundred thirty-two thousand, eight hundred twelve".