63868001520 has 160 divisors (see below), whose sum is σ = 205054286400. Its totient is φ = 16425213952.

The previous prime is 63868001501. The next prime is 63868001537. The reversal of 63868001520 is 2510086836.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6628066 + ... + 6637694.

It is an arithmetic number, because the mean of its divisors is an integer number (1281589290).

Almost surely, 2^63868001520 is an apocalyptic number.

63868001520 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 63868001520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102527143200).

63868001520 is an abundant number, since it is smaller than the sum of its proper divisors (141186284880).

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

63868001520 is a wasteful number, since it uses less digits than its factorization.

63868001520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10627 (or 10621 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 39.

The spelling of 63868001520 in words is "sixty-three billion, eight hundred sixty-eight million, one thousand, five hundred twenty".