861385011 has 8 divisors (see below), whose sum is σ = 1149290640. Its totient is φ = 573868032.

The previous prime is 861385009. The next prime is 861385033. The reversal of 861385011 is 110583168.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 861385011 - 2¹ = 861385009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (861385081) 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 7 ways as a sum of consecutive naturals, for example, 91950 + ... + 100883.

It is an arithmetic number, because the mean of its divisors is an integer number (143661330).

Almost surely, 2^861385011 is an apocalyptic number.

861385011 is a deficient number, since it is larger than the sum of its proper divisors (287905629).

861385011 is a wasteful number, since it uses less digits than its factorization.

861385011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194325.

The product of its (nonzero) digits is 5760, while the sum is 33.

The square root of 861385011 is about 29349.3613388775. The cubic root of 861385011 is about 951.4787721073.

The spelling of 861385011 in words is "eight hundred sixty-one million, three hundred eighty-five thousand, eleven".