855773942820 has 48 divisors (see below), whose sum is σ = 2406451057920. Its totient is φ = 227226954496.

The previous prime is 855773942753. The next prime is 855773942867. The reversal of 855773942820 is 28249377558.

It is a Harshad number since it is a multiple of its sum of digits (60).

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 15 ways as a sum of consecutive naturals, for example, 30593100 + ... + 30621059.

It is an arithmetic number, because the mean of its divisors is an integer number (50134397040).

Almost surely, 2^855773942820 is an apocalyptic number.

It is an amenable number.

855773942820 is an abundant number, since it is smaller than the sum of its proper divisors (1550677115100).

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

855773942820 is a wasteful number, since it uses less digits than its factorization.

855773942820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61214404 (or 61214402 counting only the distinct ones).

The product of its (nonzero) digits is 33868800, while the sum is 60.

The spelling of 855773942820 in words is "eight hundred fifty-five billion, seven hundred seventy-three million, nine hundred forty-two thousand, eight hundred twenty".