257229128282 has 16 divisors (see below), whose sum is σ = 442906799040. Its totient is φ = 109755410208.

The previous prime is 257229128153. The next prime is 257229128329. The reversal of 257229128282 is 282821922752.

It is a super-2 number, since 2×257229128282² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 257229128282.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40467107 + ... + 40473462.

It is an arithmetic number, because the mean of its divisors is an integer number (27681674940).

Almost surely, 2^257229128282 is an apocalyptic number.

257229128282 is a deficient number, since it is larger than the sum of its proper divisors (185677670758).

257229128282 is a wasteful number, since it uses less digits than its factorization.

257229128282 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80940805.

The product of its digits is 1290240, while the sum is 50.

The spelling of 257229128282 in words is "two hundred fifty-seven billion, two hundred twenty-nine million, one hundred twenty-eight thousand, two hundred eighty-two".