2108566131840 has 2048 divisors, whose sum is σ = 9206555904000. Its totient is φ = 451480780800.

The previous prime is 2108566131809. The next prime is 2108566131851. The reversal of 2108566131840 is 481316658012.

2108566131840 is a `hidden beast` number, since 2 + 1 + 0 + 8 + 566 + 1 + 3 + 1 + 84 + 0 = 666.

It is a super-2 number, since 2×2108566131840² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

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 255 ways as a sum of consecutive naturals, for example, 11649536550 + ... + 11649536730.

It is an arithmetic number, because the mean of its divisors is an integer number (4495388625).

Almost surely, 2^{2108566131840} is an apocalyptic number.

2108566131840 is a gapful number since it is divisible by the number (20) 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 2108566131840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4603277952000).

2108566131840 is an abundant number, since it is smaller than the sum of its proper divisors (7097989772160).

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

2108566131840 is an equidigital number, since it uses as much as digits as its factorization.

2108566131840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 298 (or 268 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 45.

The spelling of 2108566131840 in words is "two trillion, one hundred eight billion, five hundred sixty-six million, one hundred thirty-one thousand, eight hundred forty".