257686047068 has 12 divisors (see below), whose sum is σ = 457681188552. Its totient is φ = 126919993200.

The previous prime is 257686046951. The next prime is 257686047077. The reversal of 257686047068 is 860740686752.

It is a happy number.

It is a super-2 number, since 2×257686047068² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 257686046998 and 257686047016.

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, 480757283 + ... + 480757818.

It is an arithmetic number, because the mean of its divisors is an integer number (38140099046).

Almost surely, 2^257686047068 is an apocalyptic number.

It is an amenable number.

257686047068 is a deficient number, since it is larger than the sum of its proper divisors (199995141484).

257686047068 is a wasteful number, since it uses less digits than its factorization.

257686047068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 961515172 (or 961515170 counting only the distinct ones).

The product of its (nonzero) digits is 27095040, while the sum is 59.

The spelling of 257686047068 in words is "two hundred fifty-seven billion, six hundred eighty-six million, forty-seven thousand, sixty-eight".