256632012533705 has 8 divisors (see below), whose sum is σ = 307960229531592. Its totient is φ = 205304400366208.

The previous prime is 256632012533627. The next prime is 256632012533707. The reversal of 256632012533705 is 507335210236652.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 25167038088976 + 231464974444729 = 5016676^2 + 15213973^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 256632012533705 - 2¹⁰ = 256632012532681 is a prime.

It is a super-3 number, since 3×256632012533705³ (a number of 44 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256632012533707) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 150273602 + ... + 151971771.

It is an arithmetic number, because the mean of its divisors is an integer number (38495028691449).

Almost surely, 2^{256632012533705} is an apocalyptic number.

It is an amenable number.

256632012533705 is a deficient number, since it is larger than the sum of its proper divisors (51328216997887).

256632012533705 is a wasteful number, since it uses less digits than its factorization.

256632012533705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302415195.

The product of its (nonzero) digits is 6804000, while the sum is 50.

The spelling of 256632012533705 in words is "two hundred fifty-six trillion, six hundred thirty-two billion, twelve million, five hundred thirty-three thousand, seven hundred five".