63865882089 has 9 divisors (see below), whose sum is σ = 92251813693. Its totient is φ = 42576749292.

The previous prime is 63865881943. The next prime is 63865882099. The reversal of 63865882089 is 98028856836.

The square root of 63865882089 is 252717.

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

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 63865882089 - 2¹⁷ = 63865751017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63865882099) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 716032 + ... + 800270.

Almost surely, 2^63865882089 is an apocalyptic number.

63865882089 is the 252717-th square number.

63865882089 is the 126359-th centered octagonal number.

It is an amenable number.

63865882089 is a deficient number, since it is larger than the sum of its proper divisors (28385931604).

63865882089 is an frugal number, since it uses more digits than its factorization.

63865882089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168484 (or 84242 counting only the distinct ones).

The product of its (nonzero) digits is 39813120, while the sum is 63.

The spelling of 63865882089 in words is "sixty-three billion, eight hundred sixty-five million, eight hundred eighty-two thousand, eighty-nine".