257695566168 has 64 divisors (see below), whose sum is σ = 658167782400. Its totient is φ = 84060587520.

The previous prime is 257695566157. The next prime is 257695566217. The reversal of 257695566168 is 861665596752.

It is a junction number, because it is equal to n+sod(n) for n = 257695566099 and 257695566108.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 387148 + ... + 815643.

It is an arithmetic number, because the mean of its divisors is an integer number (10283871600).

Almost surely, 2^257695566168 is an apocalyptic number.

It is an amenable number.

257695566168 is an abundant number, since it is smaller than the sum of its proper divisors (400472216232).

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

257695566168 is a wasteful number, since it uses less digits than its factorization.

257695566168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1202992 (or 1202988 counting only the distinct ones).

The product of its digits is 163296000, while the sum is 66.

The spelling of 257695566168 in words is "two hundred fifty-seven billion, six hundred ninety-five million, five hundred sixty-six thousand, one hundred sixty-eight".