1131644175449 has 2 divisors, whose sum is σ = 1131644175450. Its totient is φ = 1131644175448.

The previous prime is 1131644175437. The next prime is 1131644175461. The reversal of 1131644175449 is 9445714461311.

It is a balanced prime because it is at equal distance from previous prime (1131644175437) and next prime (1131644175461).

It can be written as a sum of positive squares in only one way, i.e., 761006735449 + 370637440000 = 872357^2 + 608800^2 .

It is a cyclic number.

It is not a de Polignac number, because 1131644175449 - 2¹² = 1131644171353 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1131644175397 and 1131644175406.

It is not a weakly prime, because it can be changed into another prime (1131644175419) 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 as a sum of consecutive naturals, namely, 565822087724 + 565822087725.

It is an arithmetic number, because the mean of its divisors is an integer number (565822087725).

Almost surely, 2^{1131644175449} is an apocalyptic number.

It is an amenable number.

1131644175449 is a deficient number, since it is larger than the sum of its proper divisors (1).

1131644175449 is an equidigital number, since it uses as much as digits as its factorization.

1131644175449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1451520, while the sum is 50.

The spelling of 1131644175449 in words is "one trillion, one hundred thirty-one billion, six hundred forty-four million, one hundred seventy-five thousand, four hundred forty-nine".