11145131315545 has 16 divisors (see below), whose sum is σ = 13877225662608. Its totient is φ = 8585694904320.

The previous prime is 11145131315449. The next prime is 11145131315561. The reversal of 11145131315545 is 54551313154111.

It can be written as a sum of positive squares in 8 ways, for example, as 176343724489 + 10968787591056 = 419933^2 + 3311916^2 .

It is not a de Polignac number, because 11145131315545 - 2⁹ = 11145131315033 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11145131315498 and 11145131315507.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 310517896 + ... + 310553785.

It is an arithmetic number, because the mean of its divisors is an integer number (867326603913).

Almost surely, 2^{11145131315545} is an apocalyptic number.

It is an amenable number.

11145131315545 is a deficient number, since it is larger than the sum of its proper divisors (2732094347063).

11145131315545 is an equidigital number, since it uses as much as digits as its factorization.

11145131315545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 621071820.

The product of its digits is 90000, while the sum is 40.

Adding to 11145131315545 its reverse (54551313154111), we get a palindrome (65696444469656).

The spelling of 11145131315545 in words is "eleven trillion, one hundred forty-five billion, one hundred thirty-one million, three hundred fifteen thousand, five hundred forty-five".