257676945 has 8 divisors (see below), whose sum is σ = 412283136. Its totient is φ = 137427696.

The previous prime is 257676943. The next prime is 257676967. The reversal of 257676945 is 549676752.

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

It is not a de Polignac number, because 257676945 - 2¹ = 257676943 is a prime.

It is not an unprimeable number, because it can be changed into a prime (257676943) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 8589217 + ... + 8589246.

It is an arithmetic number, because the mean of its divisors is an integer number (51535392).

Almost surely, 2^257676945 is an apocalyptic number.

It is an amenable number.

257676945 is a deficient number, since it is larger than the sum of its proper divisors (154606191).

257676945 is a wasteful number, since it uses less digits than its factorization.

257676945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17178471.

The product of its digits is 3175200, while the sum is 51.

The square root of 257676945 is about 16052.3189913483. The cubic root of 257676945 is about 636.3438545459.

The spelling of 257676945 in words is "two hundred fifty-seven million, six hundred seventy-six thousand, nine hundred forty-five".