2818191919091 has 2 divisors, whose sum is σ = 2818191919092. Its totient is φ = 2818191919090.

The previous prime is 2818191919069. The next prime is 2818191919121. The reversal of 2818191919091 is 1909191918182.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2818191919091 - 2³⁰ = 2817118177267 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2818191919091.

It is not a weakly prime, because it can be changed into another prime (2818191913091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1409095959545 + 1409095959546.

It is an arithmetic number, because the mean of its divisors is an integer number (1409095959546).

Almost surely, 2^{2818191919091} is an apocalyptic number.

2818191919091 is a deficient number, since it is larger than the sum of its proper divisors (1).

2818191919091 is an equidigital number, since it uses as much as digits as its factorization.

2818191919091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 839808, while the sum is 59.

Subtracting from 2818191919091 its reverse (1909191918182), we obtain a palindrome (909000000909).

The spelling of 2818191919091 in words is "two trillion, eight hundred eighteen billion, one hundred ninety-one million, nine hundred nineteen thousand, ninety-one".