861085208562 has 8 divisors (see below), whose sum is σ = 1722170417136. Its totient is φ = 287028402852.

The previous prime is 861085208461. The next prime is 861085208563. The reversal of 861085208562 is 265802580168.

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

861085208562 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (861085208563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71757100708 + ... + 71757100719.

It is an arithmetic number, because the mean of its divisors is an integer number (215271302142).

Almost surely, 2^861085208562 is an apocalyptic number.

861085208562 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

861085208562 is a wasteful number, since it uses less digits than its factorization.

861085208562 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143514201432.

The product of its (nonzero) digits is 1843200, while the sum is 51.

The spelling of 861085208562 in words is "eight hundred sixty-one billion, eighty-five million, two hundred eight thousand, five hundred sixty-two".