257805899366467 has 2 divisors, whose sum is σ = 257805899366468. Its totient is φ = 257805899366466.

The previous prime is 257805899366341. The next prime is 257805899366473. The reversal of 257805899366467 is 764663998508752.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 257805899366467 - 2³⁹ = 257256143552579 is a prime.

It is not a weakly prime, because it can be changed into another prime (257805899336467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128902949683233 + 128902949683234.

It is an arithmetic number, because the mean of its divisors is an integer number (128902949683234).

Almost surely, 2^{257805899366467} is an apocalyptic number.

257805899366467 is a deficient number, since it is larger than the sum of its proper divisors (1).

257805899366467 is an equidigital number, since it uses as much as digits as its factorization.

257805899366467 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32920473600, while the sum is 85.

The spelling of 257805899366467 in words is "two hundred fifty-seven trillion, eight hundred five billion, eight hundred ninety-nine million, three hundred sixty-six thousand, four hundred sixty-seven".