11604886861 has 12 divisors (see below), whose sum is σ = 12546560124. Its totient is φ = 10725940800.

The previous prime is 11604886807. The next prime is 11604886871. The reversal of 11604886861 is 16868840611.

It is a happy number.

11604886861 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 4849033225 + 6755853636 = 69635^2 + 82194^2 .

It is not a de Polignac number, because 11604886861 - 2²³ = 11596498253 is a prime.

It is a super-2 number, since 2×11604886861² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11604886801) 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 11 ways as a sum of consecutive naturals, for example, 377230 + ... + 406831.

It is an arithmetic number, because the mean of its divisors is an integer number (1045546677).

Almost surely, 2^11604886861 is an apocalyptic number.

It is an amenable number.

11604886861 is a deficient number, since it is larger than the sum of its proper divisors (941673263).

11604886861 is an equidigital number, since it uses as much as digits as its factorization.

11604886861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 784140 (or 784121 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 49.

The spelling of 11604886861 in words is "eleven billion, six hundred four million, eight hundred eighty-six thousand, eight hundred sixty-one".