1184838781009 has 81 divisors (see below), whose sum is σ = 1381431654099. Its totient is φ = 1015703919360.

The previous prime is 1184838781001. The next prime is 1184838781073. The reversal of 1184838781009 is 9001878384811.

The square root of 1184838781009 is 1088503.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 13 ways, for example, as 437430118225 + 747408662784 = 661385^2 + 864528^2 .

It is not a de Polignac number, because 1184838781009 - 2³ = 1184838781001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1184838781001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 16230668197 + ... + 16230668269.

It is an arithmetic number, because the mean of its divisors is an integer number (17054711779).

Almost surely, 2^{1184838781009} is an apocalyptic number.

1184838781009 is the 1088503-rd square number.

1184838781009 is the 544252-nd centered octagonal number.

It is an amenable number.

1184838781009 is a deficient number, since it is larger than the sum of its proper divisors (196592873090).

1184838781009 is an frugal number, since it uses more digits than its factorization.

1184838781009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308 (or 154 counting only the distinct ones).

The product of its (nonzero) digits is 3096576, while the sum is 58.

The spelling of 1184838781009 in words is "one trillion, one hundred eighty-four billion, eight hundred thirty-eight million, seven hundred eighty-one thousand, nine".