1161443385 has 24 divisors (see below), whose sum is σ = 2038657920. Its totient is φ = 611593632.

The previous prime is 1161443363. The next prime is 1161443389. The reversal of 1161443385 is 5833441611.

1161443385 is a `hidden beast` number, since 1 + 1 + 614 + 4 + 3 + 38 + 5 = 666.

It is not a de Polignac number, because 1161443385 - 2¹⁰ = 1161442361 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1161443389) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 159799 + ... + 166908.

It is an arithmetic number, because the mean of its divisors is an integer number (84944080).

Almost surely, 2^1161443385 is an apocalyptic number.

1161443385 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1161443385 is a deficient number, since it is larger than the sum of its proper divisors (877214535).

1161443385 is a wasteful number, since it uses less digits than its factorization.

1161443385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326797 (or 326794 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 1161443385 is about 34079.9557658164. The cubic root of 1161443385 is about 1051.1531955880.

Adding to 1161443385 its reverse (5833441611), we get a palindrome (6994884996).

The spelling of 1161443385 in words is "one billion, one hundred sixty-one million, four hundred forty-three thousand, three hundred eighty-five".