257366468633 has 2 divisors, whose sum is σ = 257366468634. Its totient is φ = 257366468632.

The previous prime is 257366468591. The next prime is 257366468687. The reversal of 257366468633 is 336864663752.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 202798910224 + 54567558409 = 450332^2 + 233597^2 .

It is a cyclic number.

It is not a de Polignac number, because 257366468633 - 2¹⁴ = 257366452249 is a prime.

It is not a weakly prime, because it can be changed into another prime (257366468033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128683234316 + 128683234317.

It is an arithmetic number, because the mean of its divisors is an integer number (128683234317).

Almost surely, 2^257366468633 is an apocalyptic number.

It is an amenable number.

257366468633 is a deficient number, since it is larger than the sum of its proper divisors (1).

257366468633 is an equidigital number, since it uses as much as digits as its factorization.

257366468633 is an evil number, because the sum of its binary digits is even.

The product of its digits is 78382080, while the sum is 59.

The spelling of 257366468633 in words is "two hundred fifty-seven billion, three hundred sixty-six million, four hundred sixty-eight thousand, six hundred thirty-three".