257066496842 has 8 divisors (see below), whose sum is σ = 387199744932. Its totient is φ = 127999915200.

The previous prime is 257066496839. The next prime is 257066496923. The reversal of 257066496842 is 248694660752.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 252939590761 + 4126906081 = 502931^2 + 64241^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 266666009 + ... + 266666972.

Almost surely, 2^257066496842 is an apocalyptic number.

257066496842 is a deficient number, since it is larger than the sum of its proper divisors (130133248090).

257066496842 is a wasteful number, since it uses less digits than its factorization.

257066496842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 533333224.

The product of its (nonzero) digits is 34836480, while the sum is 59.

The spelling of 257066496842 in words is "two hundred fifty-seven billion, sixty-six million, four hundred ninety-six thousand, eight hundred forty-two".