257644342208 has 28 divisors (see below), whose sum is σ = 557741446872. Its totient is φ = 117111064320.

The previous prime is 257644342199. The next prime is 257644342247. The reversal of 257644342208 is 802243446752.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 182985335 + ... + 182986742.

Almost surely, 2^257644342208 is an apocalyptic number.

It is an amenable number.

257644342208 is an abundant number, since it is smaller than the sum of its proper divisors (300097104664).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

257644342208 is a wasteful number, since it uses less digits than its factorization.

257644342208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 365972100 (or 365972090 counting only the distinct ones).

The product of its (nonzero) digits is 2580480, while the sum is 47.

The spelling of 257644342208 in words is "two hundred fifty-seven billion, six hundred forty-four million, three hundred forty-two thousand, two hundred eight".