1265127764013 has 12 divisors (see below), whose sum is σ = 1839508803808. Its totient is φ = 837832955400.

The previous prime is 1265127764003. The next prime is 1265127764059. The reversal of 1265127764013 is 3104677215621.

1265127764013 is a `hidden beast` number, since 1 + 2 + 6 + 512 + 77 + 64 + 0 + 1 + 3 = 666.

It is not a de Polignac number, because 1265127764013 - 2¹⁰ = 1265127762989 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1265127764013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1265127764003) 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, 465461395 + ... + 465464112.

Almost surely, 2^{1265127764013} is an apocalyptic number.

It is an amenable number.

1265127764013 is a deficient number, since it is larger than the sum of its proper divisors (574381039795).

1265127764013 is a wasteful number, since it uses less digits than its factorization.

1265127764013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 930925664 (or 930925661 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 45.

The spelling of 1265127764013 in words is "one trillion, two hundred sixty-five billion, one hundred twenty-seven million, seven hundred sixty-four thousand, thirteen".