257005355517172 has 12 divisors (see below), whose sum is σ = 449792719871040. Its totient is φ = 128493149839736.

The previous prime is 257005355517139. The next prime is 257005355517193. The reversal of 257005355517172 is 271715553500752.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2381919022 + ... + 2382026917.

It is an arithmetic number, because the mean of its divisors is an integer number (37482726655920).

Almost surely, 2^{257005355517172} is an apocalyptic number.

It is an amenable number.

257005355517172 is a deficient number, since it is larger than the sum of its proper divisors (192787364353868).

257005355517172 is a wasteful number, since it uses less digits than its factorization.

257005355517172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4763959430 (or 4763959428 counting only the distinct ones).

The product of its (nonzero) digits is 12862500, while the sum is 55.

The spelling of 257005355517172 in words is "two hundred fifty-seven trillion, five billion, three hundred fifty-five million, five hundred seventeen thousand, one hundred seventy-two".