257628728211 has 16 divisors (see below), whose sum is σ = 343832075040. Its totient is φ = 171589017600.

The previous prime is 257628728143. The next prime is 257628728243. The reversal of 257628728211 is 112827826752.

It is not a de Polignac number, because 257628728211 - 2¹⁴ = 257628711827 is a prime.

It is not an unprimeable number, because it can be changed into a prime (257628728251) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15730635 + ... + 15747003.

It is an arithmetic number, because the mean of its divisors is an integer number (21489504690).

Almost surely, 2^257628728211 is an apocalyptic number.

257628728211 is a deficient number, since it is larger than the sum of its proper divisors (86203346829).

257628728211 is a wasteful number, since it uses less digits than its factorization.

257628728211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21046.

The product of its digits is 1505280, while the sum is 51.

The spelling of 257628728211 in words is "two hundred fifty-seven billion, six hundred twenty-eight million, seven hundred twenty-eight thousand, two hundred eleven".