8637215887872 has 2560 divisors, whose sum is σ = 34093417881600. Its totient is φ = 2141308846080.

The previous prime is 8637215887829. The next prime is 8637215887877. The reversal of 8637215887872 is 2787885127368.

8637215887872 is a `hidden beast` number, since 8 + 6 + 37 + 2 + 1 + 588 + 7 + 8 + 7 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a self number, because there is not a number n which added to its sum of digits gives 8637215887872.

It is not an unprimeable number, because it can be changed into a prime (8637215887877) by changing a digit.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 51719855533 + ... + 51719855699.

It is an arithmetic number, because the mean of its divisors is an integer number (13317741360).

Almost surely, 2^{8637215887872} 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 8637215887872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17046708940800).

8637215887872 is an abundant number, since it is smaller than the sum of its proper divisors (25456201993728).

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

8637215887872 is a wasteful number, since it uses less digits than its factorization.

8637215887872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266 (or 232 counting only the distinct ones).

The product of its digits is 505774080, while the sum is 72.

The spelling of 8637215887872 in words is "eight trillion, six hundred thirty-seven billion, two hundred fifteen million, eight hundred eighty-seven thousand, eight hundred seventy-two".