12766740437243 has 16 divisors (see below), whose sum is σ = 14079139447296. Its totient is φ = 11501946237600.

The previous prime is 12766740437233. The next prime is 12766740437257. The reversal of 12766740437243 is 34273404766721.

It is not a de Polignac number, because 12766740437243 - 2²⁶ = 12766673328379 is a prime.

It is a super-2 number, since 2×12766740437243² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12766740437203) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7863533 + ... + 9347118.

It is an arithmetic number, because the mean of its divisors is an integer number (879946215456).

Almost surely, 2^{12766740437243} is an apocalyptic number.

12766740437243 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

12766740437243 is a deficient number, since it is larger than the sum of its proper divisors (1312399010053).

12766740437243 is a wasteful number, since it uses less digits than its factorization.

12766740437243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17212034.

The product of its (nonzero) digits is 28449792, while the sum is 56.

The spelling of 12766740437243 in words is "twelve trillion, seven hundred sixty-six billion, seven hundred forty million, four hundred thirty-seven thousand, two hundred forty-three".