3540747126509 has 2 divisors, whose sum is σ = 3540747126510. Its totient is φ = 3540747126508.

The previous prime is 3540747126491. The next prime is 3540747126577. The reversal of 3540747126509 is 9056217470453.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2941482255625 + 599264870884 = 1715075^2 + 774122^2 .

It is a cyclic number.

It is not a de Polignac number, because 3540747126509 - 2¹² = 3540747122413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3540747126209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1770373563254 + 1770373563255.

It is an arithmetic number, because the mean of its divisors is an integer number (1770373563255).

Almost surely, 2^{3540747126509} is an apocalyptic number.

It is an amenable number.

3540747126509 is a deficient number, since it is larger than the sum of its proper divisors (1).

3540747126509 is an equidigital number, since it uses as much as digits as its factorization.

3540747126509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6350400, while the sum is 53.

The spelling of 3540747126509 in words is "three trillion, five hundred forty billion, seven hundred forty-seven million, one hundred twenty-six thousand, five hundred nine".