1265545155213 has 12 divisors (see below), whose sum is σ = 1828064173728. Its totient is φ = 843671613960.

The previous prime is 1265545155191. The next prime is 1265545155257. The reversal of 1265545155213 is 3125515455621.

1265545155213 is a `hidden beast` number, since 1 + 2 + 6 + 55 + 45 + 1 + 552 + 1 + 3 = 666.

It is not a de Polignac number, because 1265545155213 - 2⁹ = 1265545154701 is a prime.

It is a super-2 number, since 2×1265545155213² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1265545155263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1775145 + ... + 2383742.

It is an arithmetic number, because the mean of its divisors is an integer number (152338681144).

Almost surely, 2^{1265545155213} is an apocalyptic number.

It is an amenable number.

1265545155213 is a deficient number, since it is larger than the sum of its proper divisors (562519018515).

1265545155213 is a wasteful number, since it uses less digits than its factorization.

1265545155213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4192704 (or 4192701 counting only the distinct ones).

The product of its digits is 900000, while the sum is 45.

The spelling of 1265545155213 in words is "one trillion, two hundred sixty-five billion, five hundred forty-five million, one hundred fifty-five thousand, two hundred thirteen".