257668310803 has 16 divisors (see below), whose sum is σ = 273594551040. Its totient is φ = 241828070400.

The previous prime is 257668310791. The next prime is 257668310821. The reversal of 257668310803 is 308013866752.

It is a cyclic number.

It is not a de Polignac number, because 257668310803 - 2¹⁷ = 257668179731 is a prime.

It is not an unprimeable number, because it can be changed into a prime (257668310833) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19453263 + ... + 19466503.

It is an arithmetic number, because the mean of its divisors is an integer number (17099659440).

Almost surely, 2^257668310803 is an apocalyptic number.

257668310803 is a deficient number, since it is larger than the sum of its proper divisors (15926240237).

257668310803 is a wasteful number, since it uses less digits than its factorization.

257668310803 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16398.

The product of its (nonzero) digits is 1451520, while the sum is 49.

The spelling of 257668310803 in words is "two hundred fifty-seven billion, six hundred sixty-eight million, three hundred ten thousand, eight hundred three".