257550280957 has 2 divisors, whose sum is σ = 257550280958. Its totient is φ = 257550280956.

The previous prime is 257550280907. The next prime is 257550280979. The reversal of 257550280957 is 759082055752.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 227892619161 + 29657661796 = 477381^2 + 172214^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-257550280957 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 257550280898 and 257550280907.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (257550280907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128775140478 + 128775140479.

It is an arithmetic number, because the mean of its divisors is an integer number (128775140479).

Almost surely, 2^257550280957 is an apocalyptic number.

It is an amenable number.

257550280957 is a deficient number, since it is larger than the sum of its proper divisors (1).

257550280957 is an equidigital number, since it uses as much as digits as its factorization.

257550280957 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8820000, while the sum is 55.

The spelling of 257550280957 in words is "two hundred fifty-seven billion, five hundred fifty million, two hundred eighty thousand, nine hundred fifty-seven".