8771844421820 has 12 divisors (see below), whose sum is σ = 18420873285864. Its totient is φ = 3508737768720.

The previous prime is 8771844421811. The next prime is 8771844421883. The reversal of 8771844421820 is 281244481778.

It is a super-2 number, since 2×8771844421820² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 219296110526 + ... + 219296110565.

It is an arithmetic number, because the mean of its divisors is an integer number (1535072773822).

Almost surely, 2^{8771844421820} is an apocalyptic number.

It is an amenable number.

8771844421820 is an abundant number, since it is smaller than the sum of its proper divisors (9649028864044).

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

8771844421820 is a wasteful number, since it uses less digits than its factorization.

8771844421820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 438592221100 (or 438592221098 counting only the distinct ones).

The product of its (nonzero) digits is 6422528, while the sum is 56.

The spelling of 8771844421820 in words is "eight trillion, seven hundred seventy-one billion, eight hundred forty-four million, four hundred twenty-one thousand, eight hundred twenty".