257800161 has 8 divisors (see below), whose sum is σ = 346243104. Its totient is φ = 170612000.

The previous prime is 257800139. The next prime is 257800181. The reversal of 257800161 is 161008752.

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

It is a cyclic number.

It is not a de Polignac number, because 257800161 - 2⁶ = 257800097 is a prime.

It is not an unprimeable number, because it can be changed into a prime (257800181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 313215 + ... + 314036.

It is an arithmetic number, because the mean of its divisors is an integer number (43280388).

Almost surely, 2^257800161 is an apocalyptic number.

It is an amenable number.

257800161 is a deficient number, since it is larger than the sum of its proper divisors (88442943).

257800161 is a wasteful number, since it uses less digits than its factorization.

257800161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 627391.

The product of its (nonzero) digits is 3360, while the sum is 30.

The square root of 257800161 is about 16056.1564827950. The cubic root of 257800161 is about 636.4452673828.

The spelling of 257800161 in words is "two hundred fifty-seven million, eight hundred thousand, one hundred sixty-one".