8621950820 has 36 divisors (see below), whose sum is σ = 21062196540. Its totient is φ = 2956097088.

The previous prime is 8621950793. The next prime is 8621950837. The reversal of 8621950820 is 280591268.

It can be written as a sum of positive squares in 2 ways, for example, as 2534518336 + 6087432484 = 50344^2 + 78022^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4397975 + ... + 4399934.

It is an arithmetic number, because the mean of its divisors is an integer number (585061015).

Almost surely, 2^8621950820 is an apocalyptic number.

It is an amenable number.

8621950820 is an abundant number, since it is smaller than the sum of its proper divisors (12440245720).

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

8621950820 is a wasteful number, since it uses less digits than its factorization.

8621950820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8797932 (or 8797923 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 41.

The square root of 8621950820 is about 92854.4604205958. The cubic root of 8621950820 is about 2050.5412665540.

The spelling of 8621950820 in words is "eight billion, six hundred twenty-one million, nine hundred fifty thousand, eight hundred twenty".