1266712543312 has 40 divisors (see below), whose sum is σ = 2462316424232. Its totient is φ = 631278489600.

The previous prime is 1266712543307. The next prime is 1266712543319. The reversal of 1266712543312 is 2133452176621.

It can be written as a sum of positive squares in 4 ways, for example, as 798013475856 + 468699067456 = 893316^2 + 684616^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1266712543319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8315512 + ... + 8466472.

Almost surely, 2^{1266712543312} is an apocalyptic number.

It is an amenable number.

1266712543312 is a deficient number, since it is larger than the sum of its proper divisors (1195603880920).

1266712543312 is a wasteful number, since it uses less digits than its factorization.

1266712543312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152687 (or 152681 counting only the distinct ones).

The product of its digits is 362880, while the sum is 43.

The spelling of 1266712543312 in words is "one trillion, two hundred sixty-six billion, seven hundred twelve million, five hundred forty-three thousand, three hundred twelve".