1125644515541 has 16 divisors (see below), whose sum is σ = 1386742156800. Its totient is φ = 889762572288.

The previous prime is 1125644515531. The next prime is 1125644515543. The reversal of 1125644515541 is 1455154465211.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1125644515541 - 2¹⁰ = 1125644514517 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1125644515492 and 1125644515501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1125644515543) by changing a digit.

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, 5858156 + ... + 6047253.

It is an arithmetic number, because the mean of its divisors is an integer number (86671384800).

Almost surely, 2^{1125644515541} is an apocalyptic number.

It is an amenable number.

1125644515541 is a deficient number, since it is larger than the sum of its proper divisors (261097641259).

1125644515541 is a wasteful number, since it uses less digits than its factorization.

1125644515541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11906468.

The product of its digits is 480000, while the sum is 44.

The spelling of 1125644515541 in words is "one trillion, one hundred twenty-five billion, six hundred forty-four million, five hundred fifteen thousand, five hundred forty-one".