861322385836 has 24 divisors (see below), whose sum is σ = 1644388134480. Its totient is φ = 391499366400.

The previous prime is 861322385827. The next prime is 861322385843. The reversal of 861322385836 is 638583223168.

It is an unprimeable number.

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, 1467100 + ... + 1968508.

It is an arithmetic number, because the mean of its divisors is an integer number (68516172270).

Almost surely, 2^861322385836 is an apocalyptic number.

It is an amenable number.

861322385836 is a deficient number, since it is larger than the sum of its proper divisors (783065748644).

861322385836 is a wasteful number, since it uses less digits than its factorization.

861322385836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 540465 (or 540463 counting only the distinct ones).

The product of its digits is 9953280, while the sum is 55.

The spelling of 861322385836 in words is "eight hundred sixty-one billion, three hundred twenty-two million, three hundred eighty-five thousand, eight hundred thirty-six".