861850929408 has 288 divisors, whose sum is σ = 2761421107200. Its totient is φ = 233115107328.

The previous prime is 861850929361. The next prime is 861850929437. The reversal of 861850929408 is 804929058168.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 219914073 + ... + 219917991.

Almost surely, 2^861850929408 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 861850929408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1380710553600).

861850929408 is an abundant number, since it is smaller than the sum of its proper divisors (1899570177792).

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

861850929408 is a wasteful number, since it uses less digits than its factorization.

861850929408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6117 (or 6103 counting only the distinct ones).

The product of its (nonzero) digits is 9953280, while the sum is 60.

The spelling of 861850929408 in words is "eight hundred sixty-one billion, eight hundred fifty million, nine hundred twenty-nine thousand, four hundred eight".