257974850911669 has 2 divisors, whose sum is σ = 257974850911670. Its totient is φ = 257974850911668.

The previous prime is 257974850911663. The next prime is 257974850911681. The reversal of 257974850911669 is 966119058479752.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 134411329088100 + 123563521823569 = 11593590^2 + 11115913^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-257974850911669 is a prime.

It is a super-2 number, since 2×257974850911669² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (257974850911663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128987425455834 + 128987425455835.

It is an arithmetic number, because the mean of its divisors is an integer number (128987425455835).

Almost surely, 2^{257974850911669} is an apocalyptic number.

It is an amenable number.

257974850911669 is a deficient number, since it is larger than the sum of its proper divisors (1).

257974850911669 is an equidigital number, since it uses as much as digits as its factorization.

257974850911669 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2057529600, while the sum is 79.

The spelling of 257974850911669 in words is "two hundred fifty-seven trillion, nine hundred seventy-four billion, eight hundred fifty million, nine hundred eleven thousand, six hundred sixty-nine".