257248384994 has 8 divisors (see below), whose sum is σ = 386040574188. Its totient is φ = 128568193600.

The previous prime is 257248384889. The next prime is 257248384999. The reversal of 257248384994 is 499483842752.

It can be written as a sum of positive squares in 2 ways, for example, as 255929751025 + 1318633969 = 505895^2 + 36313^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 257248384994.

It is not an unprimeable number, because it can be changed into a prime (257248384999) by changing a digit.

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, 27993707 + ... + 28002894.

Almost surely, 2^257248384994 is an apocalyptic number.

257248384994 is a deficient number, since it is larger than the sum of its proper divisors (128792189194).

257248384994 is a wasteful number, since it uses less digits than its factorization.

257248384994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55998900.

The product of its digits is 139345920, while the sum is 65.

The spelling of 257248384994 in words is "two hundred fifty-seven billion, two hundred forty-eight million, three hundred eighty-four thousand, nine hundred ninety-four".