8620632818 has 54 divisors (see below), whose sum is σ = 15361470189. Its totient is φ = 3617742912.

The previous prime is 8620632809. The next prime is 8620632851. The reversal of 8620632818 is 8182360268.

It can be written as a sum of positive squares in 2 ways, for example, as 5444521369 + 3176111449 = 73787^2 + 56357^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=65653.

It is a super-2 number, since 2×8620632818² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

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, 76288730 + ... + 76288842.

Almost surely, 2^8620632818 is an apocalyptic number.

8620632818 is a deficient number, since it is larger than the sum of its proper divisors (6740837371).

8620632818 is an equidigital number, since it uses as much as digits as its factorization.

8620632818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408 (or 205 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 44.

The square root of 8620632818 is about 92847.3630104808. The cubic root of 8620632818 is about 2050.4367753056.

The spelling of 8620632818 in words is "eight billion, six hundred twenty million, six hundred thirty-two thousand, eight hundred eighteen".