872121402831500 has 96 divisors (see below), whose sum is σ = 1907843727334272. Its totient is φ = 348275259360000.

The previous prime is 872121402831499. The next prime is 872121402831517. The reversal of 872121402831500 is 5138204121278.

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, 6099490010 + ... + 6099632990.

It is an arithmetic number, because the mean of its divisors is an integer number (19873372159732).

Almost surely, 2^{872121402831500} 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 872121402831500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (953921863667136).

872121402831500 is an abundant number, since it is smaller than the sum of its proper divisors (1035722324502772).

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

872121402831500 is a wasteful number, since it uses less digits than its factorization.

872121402831500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162964 (or 162952 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 44.

Adding to 872121402831500 its reverse (5138204121278), we get a palindrome (877259606952778).

The spelling of 872121402831500 in words is "eight hundred seventy-two trillion, one hundred twenty-one billion, four hundred two million, eight hundred thirty-one thousand, five hundred".