2158895196349 has 2 divisors, whose sum is σ = 2158895196350. Its totient is φ = 2158895196348.

The previous prime is 2158895196217. The next prime is 2158895196371. The reversal of 2158895196349 is 9436915988512.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2125982705625 + 32912490724 = 1458075^2 + 181418^2 .

It is a cyclic number.

It is not a de Polignac number, because 2158895196349 - 2²¹ = 2158893099197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2158895196049) by changing a digit.

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 as a sum of consecutive naturals, namely, 1079447598174 + 1079447598175.

It is an arithmetic number, because the mean of its divisors is an integer number (1079447598175).

Almost surely, 2^{2158895196349} is an apocalyptic number.

It is an amenable number.

2158895196349 is a deficient number, since it is larger than the sum of its proper divisors (1).

2158895196349 is an equidigital number, since it uses as much as digits as its factorization.

2158895196349 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 167961600, while the sum is 70.

The spelling of 2158895196349 in words is "two trillion, one hundred fifty-eight billion, eight hundred ninety-five million, one hundred ninety-six thousand, three hundred forty-nine".