265640352263256 has 256 divisors, whose sum is σ = 694030179173760. Its totient is φ = 84654559641600.

The previous prime is 265640352263233. The next prime is 265640352263303. The reversal of 265640352263256 is 652362253046562.

It is a junction number, because it is equal to n+sod(n) for n = 265640352263196 and 265640352263205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 12067419706 + ... + 12067441718.

Almost surely, 2^{265640352263256} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 265640352263256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (347015089586880).

265640352263256 is an abundant number, since it is smaller than the sum of its proper divisors (428389826910504).

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

265640352263256 is a wasteful number, since it uses less digits than its factorization.

265640352263256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23174 (or 23170 counting only the distinct ones).

The product of its (nonzero) digits is 93312000, while the sum is 57.

The spelling of 265640352263256 in words is "two hundred sixty-five trillion, six hundred forty billion, three hundred fifty-two million, two hundred sixty-three thousand, two hundred fifty-six".