1266103231365 has 16 divisors (see below), whose sum is σ = 2315160194688. Its totient is φ = 578790048576.

The previous prime is 1266103231357. The next prime is 1266103231411. The reversal of 1266103231365 is 5631323016621.

It is not a de Polignac number, because 1266103231365 - 2³ = 1266103231357 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6029062902 + ... + 6029063111.

It is an arithmetic number, because the mean of its divisors is an integer number (144697512168).

Almost surely, 2^{1266103231365} is an apocalyptic number.

1266103231365 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1266103231365 is a deficient number, since it is larger than the sum of its proper divisors (1049056963323).

1266103231365 is a wasteful number, since it uses less digits than its factorization.

1266103231365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12058126028.

The product of its (nonzero) digits is 116640, while the sum is 39.

Adding to 1266103231365 its reverse (5631323016621), we get a palindrome (6897426247986).

The spelling of 1266103231365 in words is "one trillion, two hundred sixty-six billion, one hundred three million, two hundred thirty-one thousand, three hundred sixty-five".