266041021263545 has 12 divisors (see below), whose sum is σ = 350910305733540. Its totient is φ = 193484379100320.

The previous prime is 266041021263509. The next prime is 266041021263559. The reversal of 266041021263545 is 545362120140662.

It can be written as a sum of positive squares in 2 ways, for example, as 140681043697216 + 125359977566329 = 11860904^2 + 11196427^2 .

It is not a de Polignac number, because 266041021263545 - 2¹⁴ = 266041021247161 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 266041021263545.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 219868612010 + ... + 219868613219.

It is an arithmetic number, because the mean of its divisors is an integer number (29242525477795).

Almost surely, 2^{266041021263545} is an apocalyptic number.

It is an amenable number.

266041021263545 is a deficient number, since it is larger than the sum of its proper divisors (84869284469995).

266041021263545 is a wasteful number, since it uses less digits than its factorization.

266041021263545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 439737225256 (or 439737225245 counting only the distinct ones).

The product of its (nonzero) digits is 2073600, while the sum is 47.

The spelling of 266041021263545 in words is "two hundred sixty-six trillion, forty-one billion, twenty-one million, two hundred sixty-three thousand, five hundred forty-five".