256712262633246 has 256 divisors, whose sum is σ = 618711197091840. Its totient is φ = 69486661969920.

The previous prime is 256712262633221. The next prime is 256712262633263. The reversal of 256712262633246 is 642336262217652.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 4003402941 + ... + 4003467063.

It is an arithmetic number, because the mean of its divisors is an integer number (2416840613640).

Almost surely, 2^{256712262633246} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 256712262633246, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (309355598545920).

256712262633246 is an abundant number, since it is smaller than the sum of its proper divisors (361998934458594).

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

256712262633246 is a wasteful number, since it uses less digits than its factorization.

256712262633246 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64659.

The product of its digits is 52254720, while the sum is 57.

The spelling of 256712262633246 in words is "two hundred fifty-six trillion, seven hundred twelve billion, two hundred sixty-two million, six hundred thirty-three thousand, two hundred forty-six".