2196815428109 has 2 divisors, whose sum is σ = 2196815428110. Its totient is φ = 2196815428108.

The previous prime is 2196815428043. The next prime is 2196815428111. The reversal of 2196815428109 is 9018245186912.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2157975690025 + 38839738084 = 1469005^2 + 197078^2 .

It is a cyclic number.

It is not a de Polignac number, because 2196815428109 - 2⁸ = 2196815427853 is a prime.

Together with 2196815428111, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2196815428139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1098407714054 + 1098407714055.

It is an arithmetic number, because the mean of its divisors is an integer number (1098407714055).

Almost surely, 2^{2196815428109} is an apocalyptic number.

It is an amenable number.

2196815428109 is a deficient number, since it is larger than the sum of its proper divisors (1).

2196815428109 is an equidigital number, since it uses as much as digits as its factorization.

2196815428109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2488320, while the sum is 56.

The spelling of 2196815428109 in words is "two trillion, one hundred ninety-six billion, eight hundred fifteen million, four hundred twenty-eight thousand, one hundred nine".