8516115558720 has 4032 divisors, whose sum is σ = 40721776263168. Its totient is φ = 1655429529600.

The previous prime is 8516115558701. The next prime is 8516115558781. The reversal of 8516115558720 is 278555116158.

It is a happy number.

8516115558720 is a `hidden beast` number, since 8 + 5 + 1 + 6 + 1 + 1 + 55 + 587 + 2 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (4032).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 575 ways as a sum of consecutive naturals, for example, 87795005712 + ... + 87795005808.

Almost surely, 2^{8516115558720} is an apocalyptic number.

8516115558720 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8516115558720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20360888131584).

8516115558720 is an abundant number, since it is smaller than the sum of its proper divisors (32205660704448).

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

8516115558720 is a wasteful number, since it uses less digits than its factorization.

8516115558720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232 (or 199 counting only the distinct ones).

The product of its (nonzero) digits is 3360000, while the sum is 54.

The spelling of 8516115558720 in words is "eight trillion, five hundred sixteen billion, one hundred fifteen million, five hundred fifty-eight thousand, seven hundred twenty".