63989259880 has 256 divisors, whose sum is σ = 179988480000. Its totient is φ = 19935756288.

The previous prime is 63989259847. The next prime is 63989259881. The reversal of 63989259880 is 8895298936.

It is a super-2 number, since 2×63989259880² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (63989259881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 68879256 + ... + 68880184.

It is an arithmetic number, because the mean of its divisors is an integer number (703080000).

Almost surely, 2^63989259880 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 63989259880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89994240000).

63989259880 is an abundant number, since it is smaller than the sum of its proper divisors (115999220120).

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

63989259880 is a wasteful number, since it uses less digits than its factorization.

63989259880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1236 (or 1232 counting only the distinct ones).

The product of its (nonzero) digits is 67184640, while the sum is 67.

The spelling of 63989259880 in words is "sixty-three billion, nine hundred eighty-nine million, two hundred fifty-nine thousand, eight hundred eighty".