256726301450660 has 12 divisors (see below), whose sum is σ = 539125233046428. Its totient is φ = 102690520580256.

The previous prime is 256726301450617. The next prime is 256726301450683. The reversal of 256726301450660 is 66054103627652.

It can be written as a sum of positive squares in 2 ways, for example, as 163225562752576 + 93500738698084 = 12775976^2 + 9669578^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6418157536247 + ... + 6418157536286.

It is an arithmetic number, because the mean of its divisors is an integer number (44927102753869).

Almost surely, 2^{256726301450660} is an apocalyptic number.

256726301450660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

256726301450660 is an abundant number, since it is smaller than the sum of its proper divisors (282398931595768).

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

256726301450660 is a wasteful number, since it uses less digits than its factorization.

256726301450660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12836315072542 (or 12836315072540 counting only the distinct ones).

The product of its (nonzero) digits is 10886400, while the sum is 53.

The spelling of 256726301450660 in words is "two hundred fifty-six trillion, seven hundred twenty-six billion, three hundred one million, four hundred fifty thousand, six hundred sixty".