861135611 has 8 divisors (see below), whose sum is σ = 986312160. Its totient is φ = 736498368.

The previous prime is 861135607. The next prime is 861135619. The reversal of 861135611 is 116531168.

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 861135611 - 2² = 861135607 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (861135619) 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 7 ways as a sum of consecutive naturals, for example, 131396 + ... + 137793.

It is an arithmetic number, because the mean of its divisors is an integer number (123289020).

Almost surely, 2^861135611 is an apocalyptic number.

861135611 is a deficient number, since it is larger than the sum of its proper divisors (125176549).

861135611 is a wasteful number, since it uses less digits than its factorization.

861135611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269653.

The product of its digits is 4320, while the sum is 32.

The square root of 861135611 is about 29345.1122165174. The cubic root of 861135611 is about 951.3869348497.

Adding to 861135611 its reverse (116531168), we get a palindrome (977666779).

The spelling of 861135611 in words is "eight hundred sixty-one million, one hundred thirty-five thousand, six hundred eleven".