8617538820 has 96 divisors (see below), whose sum is σ = 26768931840. Its totient is φ = 2053682560.

The previous prime is 8617538779. The next prime is 8617538837. The reversal of 8617538820 is 288357168.

It is a self number, because there is not a number n which added to its sum of digits gives 8617538820.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 71712 + ... + 149591.

It is an arithmetic number, because the mean of its divisors is an integer number (278843040).

Almost surely, 2^8617538820 is an apocalyptic number.

It is an amenable number.

8617538820 is an abundant number, since it is smaller than the sum of its proper divisors (18151393020).

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

8617538820 is a wasteful number, since it uses less digits than its factorization.

8617538820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221385 (or 221383 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 48.

The square root of 8617538820 is about 92830.6997711425. The cubic root of 8617538820 is about 2050.1914411737.

The spelling of 8617538820 in words is "eight billion, six hundred seventeen million, five hundred thirty-eight thousand, eight hundred twenty".