2656348325209 has 2 divisors, whose sum is σ = 2656348325210. Its totient is φ = 2656348325208.

The previous prime is 2656348325207. The next prime is 2656348325249. The reversal of 2656348325209 is 9025238436562.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2622932485209 + 33415840000 = 1619547^2 + 182800^2 .

It is a cyclic number.

It is not a de Polignac number, because 2656348325209 - 2¹ = 2656348325207 is a prime.

Together with 2656348325207, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 2656348325209.

It is not a weakly prime, because it can be changed into another prime (2656348325201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1328174162604 + 1328174162605.

It is an arithmetic number, because the mean of its divisors is an integer number (1328174162605).

Almost surely, 2^{2656348325209} is an apocalyptic number.

It is an amenable number.

2656348325209 is a deficient number, since it is larger than the sum of its proper divisors (1).

2656348325209 is an equidigital number, since it uses as much as digits as its factorization.

2656348325209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18662400, while the sum is 55.

The spelling of 2656348325209 in words is "two trillion, six hundred fifty-six billion, three hundred forty-eight million, three hundred twenty-five thousand, two hundred nine".