2540338740437 has 2 divisors, whose sum is σ = 2540338740438. Its totient is φ = 2540338740436.

The previous prime is 2540338740427. The next prime is 2540338740559. The reversal of 2540338740437 is 7340478330452.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1524518661796 + 1015820078641 = 1234714^2 + 1007879^2 .

It is a cyclic number.

It is not a de Polignac number, because 2540338740437 - 2¹⁰ = 2540338739413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2540338740427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1270169370218 + 1270169370219.

It is an arithmetic number, because the mean of its divisors is an integer number (1270169370219).

Almost surely, 2^{2540338740437} is an apocalyptic number.

It is an amenable number.

2540338740437 is a deficient number, since it is larger than the sum of its proper divisors (1).

2540338740437 is an equidigital number, since it uses as much as digits as its factorization.

2540338740437 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6773760, while the sum is 50.

The spelling of 2540338740437 in words is "two trillion, five hundred forty billion, three hundred thirty-eight million, seven hundred forty thousand, four hundred thirty-seven".