2656320144389 has 2 divisors, whose sum is σ = 2656320144390. Its totient is φ = 2656320144388.

The previous prime is 2656320144343. The next prime is 2656320144433. The reversal of 2656320144389 is 9834410236562.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2139833575489 + 516486568900 = 1462817^2 + 718670^2 .

It is a cyclic number.

It is not a de Polignac number, because 2656320144389 - 2²⁰ = 2656319095813 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2656320144389.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2656320144589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1328160072194 + 1328160072195.

It is an arithmetic number, because the mean of its divisors is an integer number (1328160072195).

Almost surely, 2^{2656320144389} is an apocalyptic number.

It is an amenable number.

2656320144389 is a deficient number, since it is larger than the sum of its proper divisors (1).

2656320144389 is an equidigital number, since it uses as much as digits as its factorization.

2656320144389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7464960, while the sum is 53.

The spelling of 2656320144389 in words is "two trillion, six hundred fifty-six billion, three hundred twenty million, one hundred forty-four thousand, three hundred eighty-nine".