257394240029 has 16 divisors (see below), whose sum is σ = 261959961600. Its totient is φ = 252875831040.

The previous prime is 257394240011. The next prime is 257394240043. The reversal of 257394240029 is 920042493752.

It is a cyclic number.

It is not a de Polignac number, because 257394240029 - 2¹² = 257394235933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257394240629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8183924 + ... + 8215314.

It is an arithmetic number, because the mean of its divisors is an integer number (16372497600).

Almost surely, 2^257394240029 is an apocalyptic number.

It is an amenable number.

257394240029 is a deficient number, since it is larger than the sum of its proper divisors (4565721571).

257394240029 is a wasteful number, since it uses less digits than its factorization.

257394240029 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32140.

The product of its (nonzero) digits is 1088640, while the sum is 47.

The spelling of 257394240029 in words is "two hundred fifty-seven billion, three hundred ninety-four million, two hundred forty thousand, twenty-nine".