855220400672 has 24 divisors (see below), whose sum is σ = 1836780179472. Its totient is φ = 388736545600.

The previous prime is 855220400599. The next prime is 855220400677. The reversal of 855220400672 is 276004022558.

It is not an unprimeable number, because it can be changed into a prime (855220400677) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1214801354 + ... + 1214802057.

It is an arithmetic number, because the mean of its divisors is an integer number (76532507478).

Almost surely, 2^855220400672 is an apocalyptic number.

It is an amenable number.

855220400672 is an abundant number, since it is smaller than the sum of its proper divisors (981559778800).

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

855220400672 is a wasteful number, since it uses less digits than its factorization.

855220400672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2429603432 (or 2429603424 counting only the distinct ones).

The product of its (nonzero) digits is 268800, while the sum is 41.

The spelling of 855220400672 in words is "eight hundred fifty-five billion, two hundred twenty million, four hundred thousand, six hundred seventy-two".