257838566782 has 8 divisors (see below), whose sum is σ = 399233909952. Its totient is φ = 124760596800.

The previous prime is 257838566773. The next prime is 257838566801. The reversal of 257838566782 is 287665838752.

It is a sphenic number, since it is the product of 3 distinct primes.

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 3 ways as a sum of consecutive naturals, for example, 2079343219 + ... + 2079343342.

It is an arithmetic number, because the mean of its divisors is an integer number (49904238744).

Almost surely, 2^257838566782 is an apocalyptic number.

257838566782 is a deficient number, since it is larger than the sum of its proper divisors (141395343170).

257838566782 is a wasteful number, since it uses less digits than its factorization.

257838566782 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4158686594.

The product of its digits is 270950400, while the sum is 67.

The spelling of 257838566782 in words is "two hundred fifty-seven billion, eight hundred thirty-eight million, five hundred sixty-six thousand, seven hundred eighty-two".