869745978220 has 48 divisors (see below), whose sum is σ = 2143806315840. Its totient is φ = 290139197184.

The previous prime is 869745978203. The next prime is 869745978253. The reversal of 869745978220 is 22879547968.

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 15 ways as a sum of consecutive naturals, for example, 83947135 + ... + 83957494.

It is an arithmetic number, because the mean of its divisors is an integer number (44662631580).

Almost surely, 2^869745978220 is an apocalyptic number.

It is an amenable number.

869745978220 is an abundant number, since it is smaller than the sum of its proper divisors (1274060337620).

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

869745978220 is a wasteful number, since it uses less digits than its factorization.

869745978220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167904682 (or 167904680 counting only the distinct ones).

The product of its (nonzero) digits is 121927680, while the sum is 67.

The spelling of 869745978220 in words is "eight hundred sixty-nine billion, seven hundred forty-five million, nine hundred seventy-eight thousand, two hundred twenty".