256506443011141 has 4 divisors (see below), whose sum is σ = 271595057305932. Its totient is φ = 241417828716352.

The previous prime is 256506443010911. The next prime is 256506443011223. The reversal of 256506443011141 is 141110344605652.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 104303122152100 + 152203320859041 = 10212890^2 + 12337071^2 .

It is a cyclic number.

It is not a de Polignac number, because 256506443011141 - 2¹¹ = 256506443009093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256506143011141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7544307147370 + ... + 7544307147403.

It is an arithmetic number, because the mean of its divisors is an integer number (67898764326483).

Almost surely, 2^{256506443011141} is an apocalyptic number.

It is an amenable number.

256506443011141 is a deficient number, since it is larger than the sum of its proper divisors (15088614294791).

256506443011141 is a wasteful number, since it uses less digits than its factorization.

256506443011141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15088614294790.

The product of its (nonzero) digits is 345600, while the sum is 43.

Adding to 256506443011141 its reverse (141110344605652), we get a palindrome (397616787616793).

The spelling of 256506443011141 in words is "two hundred fifty-six trillion, five hundred six billion, four hundred forty-three million, eleven thousand, one hundred forty-one".