1266453998127 has 12 divisors (see below), whose sum is σ = 1829337818464. Its totient is φ = 844295568480.

The previous prime is 1266453998113. The next prime is 1266453998137. The reversal of 1266453998127 is 7218993546621.

1266453998127 is a `hidden beast` number, since 1 + 2 + 6 + 6 + 4 + 539 + 98 + 1 + 2 + 7 = 666.

It is not a de Polignac number, because 1266453998127 - 2⁴ = 1266453998111 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1266453998137) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 683403 + ... + 1732035.

Almost surely, 2^{1266453998127} is an apocalyptic number.

1266453998127 is a deficient number, since it is larger than the sum of its proper divisors (562883820337).

1266453998127 is a wasteful number, since it uses less digits than its factorization.

1266453998127 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1182830 (or 1182827 counting only the distinct ones).

The product of its digits is 39191040, while the sum is 63.

The spelling of 1266453998127 in words is "one trillion, two hundred sixty-six billion, four hundred fifty-three million, nine hundred ninety-eight thousand, one hundred twenty-seven".