2557428447929 has 2 divisors, whose sum is σ = 2557428447930. Its totient is φ = 2557428447928.

The previous prime is 2557428447919. The next prime is 2557428447943. The reversal of 2557428447929 is 9297448247552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2030682000400 + 526746447529 = 1425020^2 + 725773^2 .

It is a cyclic number.

It is not a de Polignac number, because 2557428447929 - 2⁴ = 2557428447913 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (2557428447919) 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, 1278714223964 + 1278714223965.

It is an arithmetic number, because the mean of its divisors is an integer number (1278714223965).

Almost surely, 2^{2557428447929} is an apocalyptic number.

It is an amenable number.

2557428447929 is a deficient number, since it is larger than the sum of its proper divisors (1).

2557428447929 is an equidigital number, since it uses as much as digits as its factorization.

2557428447929 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 406425600, while the sum is 68.

The spelling of 2557428447929 in words is "two trillion, five hundred fifty-seven billion, four hundred twenty-eight million, four hundred forty-seven thousand, nine hundred twenty-nine".