2540340461 has 2 divisors, whose sum is σ = 2540340462. Its totient is φ = 2540340460.

The previous prime is 2540340427. The next prime is 2540340571. The reversal of 2540340461 is 1640430452.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2091324361 + 449016100 = 45731^2 + 21190^2 .

It is a cyclic number.

It is not a de Polignac number, because 2540340461 - 2²⁶ = 2473231597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2540345461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1270170230 + 1270170231.

It is an arithmetic number, because the mean of its divisors is an integer number (1270170231).

Almost surely, 2^2540340461 is an apocalyptic number.

It is an amenable number.

2540340461 is a deficient number, since it is larger than the sum of its proper divisors (1).

2540340461 is an equidigital number, since it uses as much as digits as its factorization.

2540340461 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11520, while the sum is 29.

The square root of 2540340461 is about 50401.7902559026. The cubic root of 2540340461 is about 1364.4699487253.

The spelling of 2540340461 in words is "two billion, five hundred forty million, three hundred forty thousand, four hundred sixty-one".