2163381371536 has 320 divisors, whose sum is σ = 5667065856000. Its totient is φ = 774938419200.

The previous prime is 2163381371533. The next prime is 2163381371551. The reversal of 2163381371536 is 6351731833612.

It is a self number, because there is not a number n which added to its sum of digits gives 2163381371536.

It is not an unprimeable number, because it can be changed into a prime (2163381371533) 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, 130875720 + ... + 130892248.

It is an arithmetic number, because the mean of its divisors is an integer number (17709580800).

Almost surely, 2^{2163381371536} 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 2163381371536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2833532928000).

2163381371536 is an abundant number, since it is smaller than the sum of its proper divisors (3503684484464).

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

2163381371536 is a wasteful number, since it uses less digits than its factorization.

2163381371536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16758 (or 16752 counting only the distinct ones).

The product of its digits is 1632960, while the sum is 49.

The spelling of 2163381371536 in words is "two trillion, one hundred sixty-three billion, three hundred eighty-one million, three hundred seventy-one thousand, five hundred thirty-six".