8516778395904 has 243 divisors, whose sum is σ = 24773963762457. Its totient is φ = 2813945038848.

The previous prime is 8516778395891. The next prime is 8516778395921. The reversal of 8516778395904 is 4095938776158.

The square root of 8516778395904 is 2918352.

It is a perfect power (a square), and thus also a powerful number.

8516778395904 is a `hidden beast` number, since 8 + 5 + 167 + 78 + 395 + 9 + 0 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 4629382560000 + 3887395835904 = 2151600^2 + 1971648^2 .

It is a super-2 number, since 2×8516778395904² (a number of 27 digits) contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 22833185862 + ... + 22833186234.

Almost surely, 2^{8516778395904} is an apocalyptic number.

8516778395904 is the 2918352-nd square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8516778395904

8516778395904 is an abundant number, since it is smaller than the sum of its proper divisors (16257185366553).

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

8516778395904 is an frugal number, since it uses more digits than its factorization.

8516778395904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1094 (or 541 counting only the distinct ones).

The product of its (nonzero) digits is 457228800, while the sum is 72.

The spelling of 8516778395904 in words is "eight trillion, five hundred sixteen billion, seven hundred seventy-eight million, three hundred ninety-five thousand, nine hundred four".