861062203144 has 192 divisors, whose sum is σ = 2037235173120. Its totient is φ = 335205427200.

The previous prime is 861062203123. The next prime is 861062203147. The reversal of 861062203144 is 441302260168.

It is not an unprimeable number, because it can be changed into a prime (861062203147) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 98032977 + ... + 98041759.

It is an arithmetic number, because the mean of its divisors is an integer number (10610599860).

Almost surely, 2^861062203144 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 861062203144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1018617586560).

861062203144 is an abundant number, since it is smaller than the sum of its proper divisors (1176172969976).

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

861062203144 is a wasteful number, since it uses less digits than its factorization.

861062203144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8972 (or 8897 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 37.

The spelling of 861062203144 in words is "eight hundred sixty-one billion, sixty-two million, two hundred three thousand, one hundred forty-four".