257681616 has 40 divisors (see below), whose sum is σ = 683673504. Its totient is φ = 83571840.

The previous prime is 257681609. The next prime is 257681621. The reversal of 257681616 is 616186752.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70770 + ... + 74321.

Almost surely, 2^257681616 is an apocalyptic number.

It is an amenable number.

257681616 is an abundant number, since it is smaller than the sum of its proper divisors (425991888).

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

257681616 is a wasteful number, since it uses less digits than its factorization.

257681616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145139 (or 145133 counting only the distinct ones).

The product of its digits is 120960, while the sum is 42.

The square root of 257681616 is about 16052.4644836860. The cubic root of 257681616 is about 636.3476995984.

The spelling of 257681616 in words is "two hundred fifty-seven million, six hundred eighty-one thousand, six hundred sixteen".