4056542634509 has 2 divisors, whose sum is σ = 4056542634510. Its totient is φ = 4056542634508.

The previous prime is 4056542634451. The next prime is 4056542634511. The reversal of 4056542634509 is 9054362456504.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3150518500900 + 906024133609 = 1774970^2 + 951853^2 .

It is a cyclic number.

It is not a de Polignac number, because 4056542634509 - 2⁴⁰ = 2957031006733 is a prime.

Together with 4056542634511, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4056542631509) 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, 2028271317254 + 2028271317255.

It is an arithmetic number, because the mean of its divisors is an integer number (2028271317255).

Almost surely, 2^{4056542634509} is an apocalyptic number.

It is an amenable number.

4056542634509 is a deficient number, since it is larger than the sum of its proper divisors (1).

4056542634509 is an equidigital number, since it uses as much as digits as its factorization.

4056542634509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552000, while the sum is 53.

The spelling of 4056542634509 in words is "four trillion, fifty-six billion, five hundred forty-two million, six hundred thirty-four thousand, five hundred nine".