257327121723743 has 2 divisors, whose sum is σ = 257327121723744. Its totient is φ = 257327121723742.

The previous prime is 257327121723731. The next prime is 257327121723767. The reversal of 257327121723743 is 347327121723752.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 257327121723743 - 2⁸ = 257327121723487 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (257327121723713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128663560861871 + 128663560861872.

It is an arithmetic number, because the mean of its divisors is an integer number (128663560861872).

Almost surely, 2^{257327121723743} is an apocalyptic number.

257327121723743 is a deficient number, since it is larger than the sum of its proper divisors (1).

257327121723743 is an equidigital number, since it uses as much as digits as its factorization.

257327121723743 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20744640, while the sum is 56.

Subtracting 257327121723743 from its reverse (347327121723752), we obtain a palindrome (90000000000009).

The spelling of 257327121723743 in words is "two hundred fifty-seven trillion, three hundred twenty-seven billion, one hundred twenty-one million, seven hundred twenty-three thousand, seven hundred forty-three".