871800072221568 has 512 divisors, whose sum is σ = 2871400469575680. Its totient is φ = 228648871526400.

The previous prime is 871800072221567. The next prime is 871800072221587. The reversal of 871800072221568 is 865122270008178.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (871800072221567) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6577918630 + ... + 6578051162.

It is an arithmetic number, because the mean of its divisors is an integer number (5608204042140).

Almost surely, 2^{871800072221568} 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 871800072221568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1435700234787840).

871800072221568 is an abundant number, since it is smaller than the sum of its proper divisors (1999600397354112).

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

871800072221568 is a wasteful number, since it uses less digits than its factorization.

871800072221568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136126 (or 136114 counting only the distinct ones).

The product of its (nonzero) digits is 6021120, while the sum is 57.

The spelling of 871800072221568 in words is "eight hundred seventy-one trillion, eight hundred billion, seventy-two million, two hundred twenty-one thousand, five hundred sixty-eight".