2196287778816 has 624 divisors, whose sum is σ = 6914082599424. Its totient is φ = 695280402432.

The previous prime is 2196287778779. The next prime is 2196287778847. The reversal of 2196287778816 is 6188777826912.

2196287778816 is a `hidden beast` number, since 2 + 196 + 287 + 77 + 88 + 16 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4509830925 + ... + 4509831411.

It is an arithmetic number, because the mean of its divisors is an integer number (11080260576).

Almost surely, 2^{2196287778816} 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 2196287778816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3457041299712).

2196287778816 is an abundant number, since it is smaller than the sum of its proper divisors (4717794820608).

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

2196287778816 is an equidigital number, since it uses as much as digits as its factorization.

2196287778816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 746 (or 712 counting only the distinct ones).

The product of its digits is 227598336, while the sum is 72.

The spelling of 2196287778816 in words is "two trillion, one hundred ninety-six billion, two hundred eighty-seven million, seven hundred seventy-eight thousand, eight hundred sixteen".