861231434304 has 224 divisors, whose sum is σ = 2344994015616. Its totient is φ = 278865100800.

The previous prime is 861231434281. The next prime is 861231434311. The reversal of 861231434304 is 403434132168.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 359894932 + ... + 359897324.

It is an arithmetic number, because the mean of its divisors is an integer number (10468723284).

Almost surely, 2^861231434304 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 861231434304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1172497007808).

861231434304 is an abundant number, since it is smaller than the sum of its proper divisors (1483762581312).

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

861231434304 is a wasteful number, since it uses less digits than its factorization.

861231434304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2853 (or 2843 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 39.

The spelling of 861231434304 in words is "eight hundred sixty-one billion, two hundred thirty-one million, four hundred thirty-four thousand, three hundred four".