257345734326 has 8 divisors (see below), whose sum is σ = 514691468664. Its totient is φ = 85781911440.

The previous prime is 257345734277. The next prime is 257345734343. The reversal of 257345734326 is 623437543752.

257345734326 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

257345734326 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21445477855 + ... + 21445477866.

It is an arithmetic number, because the mean of its divisors is an integer number (64336433583).

Almost surely, 2^257345734326 is an apocalyptic number.

257345734326 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

257345734326 is a wasteful number, since it uses less digits than its factorization.

257345734326 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42890955726.

The product of its digits is 12700800, while the sum is 51.

The spelling of 257345734326 in words is "two hundred fifty-seven billion, three hundred forty-five million, seven hundred thirty-four thousand, three hundred twenty-six".