63865518330 has 128 divisors (see below), whose sum is σ = 165898782720. Its totient is φ = 15680044800.

The previous prime is 63865518323. The next prime is 63865518373. The reversal of 63865518330 is 3381556836.

It is a self number, because there is not a number n which added to its sum of digits gives 63865518330.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 30600547 + ... + 30602633.

It is an arithmetic number, because the mean of its divisors is an integer number (1296084240).

Almost surely, 2^63865518330 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 63865518330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82949391360).

63865518330 is an abundant number, since it is smaller than the sum of its proper divisors (102033264390).

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

63865518330 is a wasteful number, since it uses less digits than its factorization.

63865518330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3604.

The product of its (nonzero) digits is 1555200, while the sum is 48.

The spelling of 63865518330 in words is "sixty-three billion, eight hundred sixty-five million, five hundred eighteen thousand, three hundred thirty".