63646712089 has 3 divisors (see below), whose sum is σ = 63646964373. Its totient is φ = 63646459806.

The previous prime is 63646712083. The next prime is 63646712123. The reversal of 63646712089 is 98021764636.

The square root of 63646712089 is 252283.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 63646712089 - 2⁹ = 63646711577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63646712083) by changing a digit.

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 2 ways as a sum of consecutive naturals, for example, 126142 + ... + 378424.

It is an arithmetic number, because the mean of its divisors is an integer number (21215654791).

Almost surely, 2^63646712089 is an apocalyptic number.

63646712089 is the 252283-rd square number.

63646712089 is the 126142-nd centered octagonal number.

It is an amenable number.

63646712089 is a deficient number, since it is larger than the sum of its proper divisors (252284).

63646712089 is an frugal number, since it uses more digits than its factorization.

63646712089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 504566 (or 252283 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 52.

The spelling of 63646712089 in words is "sixty-three billion, six hundred forty-six million, seven hundred twelve thousand, eighty-nine".