257760260806 has 16 divisors (see below), whose sum is σ = 393178303728. Its totient is φ = 126702972000.

The previous prime is 257760260801. The next prime is 257760260809. The reversal of 257760260806 is 608062067752.

257760260806 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 257760260806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257760260801) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 294720 + ... + 776131.

It is an arithmetic number, because the mean of its divisors is an integer number (24573643983).

Almost surely, 2^257760260806 is an apocalyptic number.

257760260806 is a deficient number, since it is larger than the sum of its proper divisors (135418042922).

257760260806 is a wasteful number, since it uses less digits than its factorization.

257760260806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1072887.

The product of its (nonzero) digits is 1693440, while the sum is 49.

The spelling of 257760260806 in words is "two hundred fifty-seven billion, seven hundred sixty million, two hundred sixty thousand, eight hundred six".