63781567612 has 48 divisors (see below), whose sum is σ = 130430103552. Its totient is φ = 26724260160.

The previous prime is 63781567601. The next prime is 63781567639. The reversal of 63781567612 is 21676518736.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 63781567612.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 344037 + ... + 495907.

It is an arithmetic number, because the mean of its divisors is an integer number (2717293824).

Almost surely, 2^63781567612 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 63781567612, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65215051776).

63781567612 is an abundant number, since it is smaller than the sum of its proper divisors (66648535940).

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

63781567612 is a wasteful number, since it uses less digits than its factorization.

63781567612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152218 (or 152216 counting only the distinct ones).

The product of its digits is 2540160, while the sum is 52.

The spelling of 63781567612 in words is "sixty-three billion, seven hundred eighty-one million, five hundred sixty-seven thousand, six hundred twelve".