2340402040261 has 2 divisors, whose sum is σ = 2340402040262. Its totient is φ = 2340402040260.

The previous prime is 2340402040219. The next prime is 2340402040271. The reversal of 2340402040261 is 1620402040432.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1720215864900 + 620186175361 = 1311570^2 + 787519^2 .

It is a cyclic number.

It is not a de Polignac number, because 2340402040261 - 2⁷ = 2340402040133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2340402040211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1170201020130 + 1170201020131.

It is an arithmetic number, because the mean of its divisors is an integer number (1170201020131).

Almost surely, 2^{2340402040261} is an apocalyptic number.

It is an amenable number.

2340402040261 is a deficient number, since it is larger than the sum of its proper divisors (1).

2340402040261 is an equidigital number, since it uses as much as digits as its factorization.

2340402040261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 2340402040261 its reverse (1620402040432), we get a palindrome (3960804080693).

It can be divided in two parts, 2340 and 402040261, that added together give a square (402042601 = 20051²).

The spelling of 2340402040261 in words is "two trillion, three hundred forty billion, four hundred two million, forty thousand, two hundred sixty-one".