2809693968822 has 160 divisors (see below), whose sum is σ = 7138640678400. Its totient is φ = 818824324032.

The previous prime is 2809693968817. The next prime is 2809693968857. The reversal of 2809693968822 is 2288693969082.

2809693968822 is a `hidden beast` number, since 2 + 80 + 9 + 69 + 396 + 88 + 22 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 316866433 + ... + 316875299.

It is an arithmetic number, because the mean of its divisors is an integer number (44616504240).

Almost surely, 2^{2809693968822} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2809693968822, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3569320339200).

2809693968822 is an abundant number, since it is smaller than the sum of its proper divisors (4328946709578).

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

2809693968822 is a wasteful number, since it uses less digits than its factorization.

2809693968822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16832 (or 16823 counting only the distinct ones).

The product of its (nonzero) digits is 322486272, while the sum is 72.

The spelling of 2809693968822 in words is "two trillion, eight hundred nine billion, six hundred ninety-three million, nine hundred sixty-eight thousand, eight hundred twenty-two".