256353450258 has 48 divisors (see below), whose sum is σ = 521561907360. Its totient is φ = 83999986560.

The previous prime is 256353450253. The next prime is 256353450289. The reversal of 256353450258 is 852054353652.

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (256353450253) 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 23 ways as a sum of consecutive naturals, for example, 63783373 + ... + 63787391.

It is an arithmetic number, because the mean of its divisors is an integer number (10865873070).

Almost surely, 2^256353450258 is an apocalyptic number.

256353450258 is an abundant number, since it is smaller than the sum of its proper divisors (265208457102).

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

256353450258 is a wasteful number, since it uses less digits than its factorization.

256353450258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7003 (or 6942 counting only the distinct ones).

The product of its (nonzero) digits is 4320000, while the sum is 48.

The spelling of 256353450258 in words is "two hundred fifty-six billion, three hundred fifty-three million, four hundred fifty thousand, two hundred fifty-eight".