1266355211445 has 12 divisors (see below), whose sum is σ = 2195015699916. Its totient is φ = 675389446080.

The previous prime is 1266355211419. The next prime is 1266355211467. The reversal of 1266355211445 is 5441125536621.

1266355211445 is a `hidden beast` number, since 1 + 2 + 6 + 635 + 5 + 2 + 1 + 1 + 4 + 4 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 959996282436 + 306358929009 = 979794^2 + 553497^2 .

It is not a de Polignac number, because 1266355211445 - 2⁹ = 1266355210933 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 28141226921 = 1266355211445 / (1 + 2 + 6 + 6 + 3 + 5 + 5 + 2 + 1 + 1 + 4 + 4 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 1266355211445.

It is a congruent number.

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, 14070613416 + ... + 14070613505.

It is an arithmetic number, because the mean of its divisors is an integer number (182917974993).

Almost surely, 2^{1266355211445} is an apocalyptic number.

1266355211445 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1266355211445 is a deficient number, since it is larger than the sum of its proper divisors (928660488471).

1266355211445 is a wasteful number, since it uses less digits than its factorization.

1266355211445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28141226932 (or 28141226929 counting only the distinct ones).

The product of its digits is 864000, while the sum is 45.

The spelling of 1266355211445 in words is "one trillion, two hundred sixty-six billion, three hundred fifty-five million, two hundred eleven thousand, four hundred forty-five".