257984939366 has 32 divisors (see below), whose sum is σ = 484245734400. Its totient is φ = 100142697600.

The previous prime is 257984939353. The next prime is 257984939371. The reversal of 257984939366 is 663939489752.

It is a self number, because there is not a number n which added to its sum of digits gives 257984939366.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3049091 + ... + 3132558.

It is an arithmetic number, because the mean of its divisors is an integer number (15132679200).

Almost surely, 2^257984939366 is an apocalyptic number.

257984939366 is a deficient number, since it is larger than the sum of its proper divisors (226260795034).

257984939366 is a wasteful number, since it uses less digits than its factorization.

257984939366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6181940.

The product of its digits is 529079040, while the sum is 71.

The spelling of 257984939366 in words is "two hundred fifty-seven billion, nine hundred eighty-four million, nine hundred thirty-nine thousand, three hundred sixty-six".