1161711445 has 8 divisors (see below), whose sum is σ = 1395335736. Its totient is φ = 928514496.

The previous prime is 1161711407. The next prime is 1161711449. The reversal of 1161711445 is 5441171611.

It can be written as a sum of positive squares in 4 ways, for example, as 748077201 + 413634244 = 27351^2 + 20338^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1161711445 - 2¹³ = 1161703253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1161711449) 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 7 ways as a sum of consecutive naturals, for example, 100822 + ... + 111751.

It is an arithmetic number, because the mean of its divisors is an integer number (174416967).

Almost surely, 2^1161711445 is an apocalyptic number.

It is an amenable number.

1161711445 is a deficient number, since it is larger than the sum of its proper divisors (233624291).

1161711445 is a wasteful number, since it uses less digits than its factorization.

1161711445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213671.

The product of its digits is 3360, while the sum is 31.

The square root of 1161711445 is about 34083.8883491893. Note that the first 3 decimals coincide. The cubic root of 1161711445 is about 1051.2340577446.

The spelling of 1161711445 in words is "one billion, one hundred sixty-one million, seven hundred eleven thousand, four hundred forty-five".