1116061645 has 16 divisors (see below), whose sum is σ = 1422992880. Its totient is φ = 840310272.

The previous prime is 1116061643. The next prime is 1116061657. The reversal of 1116061645 is 5461606111.

It can be written as a sum of positive squares in 8 ways, for example, as 120406729 + 995654916 = 10973^2 + 31554^2 .

It is not a de Polignac number, because 1116061645 - 2¹ = 1116061643 is a prime.

It is a super-3 number, since 3×1116061645³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1116061643) 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 15 ways as a sum of consecutive naturals, for example, 1849 + ... + 47281.

It is an arithmetic number, because the mean of its divisors is an integer number (88937055).

Almost surely, 2^1116061645 is an apocalyptic number.

It is an amenable number.

1116061645 is a deficient number, since it is larger than the sum of its proper divisors (306931235).

1116061645 is an frugal number, since it uses more digits than its factorization.

1116061645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45489 (or 45455 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 1116061645 is about 33407.5088116429. The cubic root of 1116061645 is about 1037.2801357299.

Adding to 1116061645 its reverse (5461606111), we get a palindrome (6577667756).

The spelling of 1116061645 in words is "one billion, one hundred sixteen million, sixty-one thousand, six hundred forty-five".