256603729546 has 8 divisors (see below), whose sum is σ = 385477521444. Its totient is φ = 128111222400.

The previous prime is 256603729541. The next prime is 256603729549. The reversal of 256603729546 is 645927306652.

It can be written as a sum of positive squares in 2 ways, for example, as 256176687321 + 427042225 = 506139^2 + 20665^2 .

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

It is a super-3 number, since 3×256603729546³ (a number of 35 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (256603729541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 95319505 + ... + 95322196.

Almost surely, 2^256603729546 is an apocalyptic number.

256603729546 is a deficient number, since it is larger than the sum of its proper divisors (128873791898).

256603729546 is a wasteful number, since it uses less digits than its factorization.

256603729546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190642376.

The product of its (nonzero) digits is 16329600, while the sum is 55.

The spelling of 256603729546 in words is "two hundred fifty-six billion, six hundred three million, seven hundred twenty-nine thousand, five hundred forty-six".