1563997159872 has 784 divisors, whose sum is σ = 5480444841984. Its totient is φ = 433340928000.

The previous prime is 1563997159843. The next prime is 1563997159889. The reversal of 1563997159872 is 2789517993651.

1563997159872 is a `hidden beast` number, since 1 + 5 + 6 + 399 + 7 + 159 + 87 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a self number, because there is not a number n which added to its sum of digits gives 1563997159872.

It is a congruent number.

It is an unprimeable number.

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 111 ways as a sum of consecutive naturals, for example, 3628763497 + ... + 3628763927.

Almost surely, 2^{1563997159872} is an apocalyptic number.

1563997159872 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 1563997159872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2740222420992).

1563997159872 is an abundant number, since it is smaller than the sum of its proper divisors (3916447682112).

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

1563997159872 is an equidigital number, since it uses as much as digits as its factorization.

1563997159872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 780 (or 755 counting only the distinct ones).

The product of its digits is 257191200, while the sum is 72.

The spelling of 1563997159872 in words is "one trillion, five hundred sixty-three billion, nine hundred ninety-seven million, one hundred fifty-nine thousand, eight hundred seventy-two".