257928012456 has 32 divisors (see below), whose sum is σ = 645221384640. Its totient is φ = 85922490368.

The previous prime is 257928012437. The next prime is 257928012457. The reversal of 257928012456 is 654210829752.

It is a junction number, because it is equal to n+sod(n) for n = 257928012399 and 257928012408.

It is not an unprimeable number, because it can be changed into a prime (257928012457) by changing a digit.

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, 3305241 + ... + 3382376.

It is an arithmetic number, because the mean of its divisors is an integer number (20163168270).

Almost surely, 2^257928012456 is an apocalyptic number.

It is an amenable number.

257928012456 is an abundant number, since it is smaller than the sum of its proper divisors (387293372184).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

257928012456 is a wasteful number, since it uses less digits than its factorization.

257928012456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6689233 (or 6689229 counting only the distinct ones).

The product of its (nonzero) digits is 2419200, while the sum is 51.

The spelling of 257928012456 in words is "two hundred fifty-seven billion, nine hundred twenty-eight million, twelve thousand, four hundred fifty-six".