257388612067 has 2 divisors, whose sum is σ = 257388612068. Its totient is φ = 257388612066.

The previous prime is 257388612059. The next prime is 257388612077. The reversal of 257388612067 is 760216883752.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 257388612067 - 2³ = 257388612059 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 257388611999 and 257388612017.

It is not a weakly prime, because it can be changed into another prime (257388612077) 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, 128694306033 + 128694306034.

It is an arithmetic number, because the mean of its divisors is an integer number (128694306034).

Almost surely, 2^257388612067 is an apocalyptic number.

257388612067 is a deficient number, since it is larger than the sum of its proper divisors (1).

257388612067 is an equidigital number, since it uses as much as digits as its factorization.

257388612067 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6773760, while the sum is 55.

The spelling of 257388612067 in words is "two hundred fifty-seven billion, three hundred eighty-eight million, six hundred twelve thousand, sixty-seven".