257305421410765 has 16 divisors (see below), whose sum is σ = 380020314699648. Its totient is φ = 162865849156416.

The previous prime is 257305421410757. The next prime is 257305421410799. The reversal of 257305421410765 is 567014124503752.

It is not a de Polignac number, because 257305421410765 - 2³ = 257305421410757 is a prime.

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, 282753209887 + ... + 282753210796.

It is an arithmetic number, because the mean of its divisors is an integer number (23751269668728).

Almost surely, 2^{257305421410765} is an apocalyptic number.

It is an amenable number.

257305421410765 is a deficient number, since it is larger than the sum of its proper divisors (122714893288883).

257305421410765 is a wasteful number, since it uses less digits than its factorization.

257305421410765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 565506420708.

The product of its (nonzero) digits is 7056000, while the sum is 52.

The spelling of 257305421410765 in words is "two hundred fifty-seven trillion, three hundred five billion, four hundred twenty-one million, four hundred ten thousand, seven hundred sixty-five".