820775147852 has 24 divisors (see below), whose sum is σ = 1581309927120. Its totient is φ = 369656861760.

The previous prime is 820775147783. The next prime is 820775147861. The reversal of 820775147852 is 258741577028.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85563923 + ... + 85573514.

It is an arithmetic number, because the mean of its divisors is an integer number (65887913630).

Almost surely, 2^820775147852 is an apocalyptic number.

It is an amenable number.

820775147852 is a deficient number, since it is larger than the sum of its proper divisors (760534779268).

820775147852 is a wasteful number, since it uses less digits than its factorization.

820775147852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171137561 (or 171137559 counting only the distinct ones).

The product of its (nonzero) digits is 8780800, while the sum is 56.

The spelling of 820775147852 in words is "eight hundred twenty billion, seven hundred seventy-five million, one hundred forty-seven thousand, eight hundred fifty-two".