257718035420 has 12 divisors (see below), whose sum is σ = 541207874424. Its totient is φ = 103087214160.

The previous prime is 257718035389. The next prime is 257718035441. The reversal of 257718035420 is 24530817752.

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, 6442950866 + ... + 6442950905.

It is an arithmetic number, because the mean of its divisors is an integer number (45100656202).

Almost surely, 2^257718035420 is an apocalyptic number.

257718035420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

257718035420 is an abundant number, since it is smaller than the sum of its proper divisors (283489839004).

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

257718035420 is a wasteful number, since it uses less digits than its factorization.

257718035420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12885901780 (or 12885901778 counting only the distinct ones).

The product of its (nonzero) digits is 470400, while the sum is 44.

The spelling of 257718035420 in words is "two hundred fifty-seven billion, seven hundred eighteen million, thirty-five thousand, four hundred twenty".