256332566741 has 2 divisors, whose sum is σ = 256332566742. Its totient is φ = 256332566740.

The previous prime is 256332566731. The next prime is 256332566771. The reversal of 256332566741 is 147665233652.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 225953819716 + 30378747025 = 475346^2 + 174295^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-256332566741 is a prime.

It is a super-2 number, since 2×256332566741² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 256332566741.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256332566731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128166283370 + 128166283371.

It is an arithmetic number, because the mean of its divisors is an integer number (128166283371).

Almost surely, 2^256332566741 is an apocalyptic number.

It is an amenable number.

256332566741 is a deficient number, since it is larger than the sum of its proper divisors (1).

256332566741 is an equidigital number, since it uses as much as digits as its factorization.

256332566741 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5443200, while the sum is 50.

The spelling of 256332566741 in words is "two hundred fifty-six billion, three hundred thirty-two million, five hundred sixty-six thousand, seven hundred forty-one".