2820408691189 has 2 divisors, whose sum is σ = 2820408691190. Its totient is φ = 2820408691188.

The previous prime is 2820408691181. The next prime is 2820408691207. The reversal of 2820408691189 is 9811968040282.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2684518402500 + 135890288689 = 1638450^2 + 368633^2 .

It is a cyclic number.

It is not a de Polignac number, because 2820408691189 - 2³ = 2820408691181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2820408691181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1410204345594 + 1410204345595.

It is an arithmetic number, because the mean of its divisors is an integer number (1410204345595).

Almost surely, 2^{2820408691189} is an apocalyptic number.

It is an amenable number.

2820408691189 is a deficient number, since it is larger than the sum of its proper divisors (1).

2820408691189 is an equidigital number, since it uses as much as digits as its factorization.

2820408691189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3981312, while the sum is 58.

The spelling of 2820408691189 in words is "two trillion, eight hundred twenty billion, four hundred eight million, six hundred ninety-one thousand, one hundred eighty-nine".