256330381458 has 16 divisors (see below), whose sum is σ = 512691895296. Its totient is φ = 85438271760.

The previous prime is 256330381457. The next prime is 256330381481. The reversal of 256330381458 is 854183033652.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (256330381451) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1189458 + ... + 1388333.

It is an arithmetic number, because the mean of its divisors is an integer number (32043243456).

Almost surely, 2^256330381458 is an apocalyptic number.

256330381458 is an abundant number, since it is smaller than the sum of its proper divisors (256361513838).

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

256330381458 is a wasteful number, since it uses less digits than its factorization.

256330381458 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2594369.

The product of its (nonzero) digits is 2073600, while the sum is 48.

The spelling of 256330381458 in words is "two hundred fifty-six billion, three hundred thirty million, three hundred eighty-one thousand, four hundred fifty-eight".