1165541413225 has 24 divisors (see below), whose sum is σ = 1672646792960. Its totient is φ = 789111573120.

The previous prime is 1165541413187. The next prime is 1165541413229. The reversal of 1165541413225 is 5223141455611.

It is not a de Polignac number, because 1165541413225 - 2³³ = 1156951478633 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1165541413229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 42139572 + ... + 42167221.

Almost surely, 2^{1165541413225} is an apocalyptic number.

It is an amenable number.

1165541413225 is a deficient number, since it is larger than the sum of its proper divisors (507105379735).

1165541413225 is an equidigital number, since it uses as much as digits as its factorization.

1165541413225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84306889 (or 84306884 counting only the distinct ones).

The product of its digits is 144000, while the sum is 40.

Adding to 1165541413225 its reverse (5223141455611), we get a palindrome (6388682868836).

The spelling of 1165541413225 in words is "one trillion, one hundred sixty-five billion, five hundred forty-one million, four hundred thirteen thousand, two hundred twenty-five".