1063989721872 has 320 divisors, whose sum is σ = 3809113344000. Its totient is φ = 276254046720.

The previous prime is 1063989721867. The next prime is 1063989721913. The reversal of 1063989721872 is 2781279893601.

1063989721872 is a `hidden beast` number, since 106 + 398 + 9 + 72 + 1 + 8 + 72 = 666.

It is a super-2 number, since 2×1063989721872² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

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, 122307379 + ... + 122316077.

It is an arithmetic number, because the mean of its divisors is an integer number (11903479200).

Almost surely, 2^{1063989721872} is an apocalyptic number.

1063989721872 is a gapful number since it is divisible by the number (12) 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 1063989721872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1904556672000).

1063989721872 is an abundant number, since it is smaller than the sum of its proper divisors (2745123622128).

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

1063989721872 is a wasteful number, since it uses less digits than its factorization.

1063989721872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12411 (or 12399 counting only the distinct ones).

The product of its (nonzero) digits is 18289152, while the sum is 63.

The spelling of 1063989721872 in words is "one trillion, sixty-three billion, nine hundred eighty-nine million, seven hundred twenty-one thousand, eight hundred seventy-two".