678221745222 has 32 divisors (see below), whose sum is σ = 1550266175232. Its totient is φ = 193772011104.

The previous prime is 678221745221. The next prime is 678221745283. The reversal of 678221745222 is 222547122876.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678221745221) 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 15 ways as a sum of consecutive naturals, for example, 1354773 + ... + 1786575.

It is an arithmetic number, because the mean of its divisors is an integer number (48445817976).

Almost surely, 2^678221745222 is an apocalyptic number.

678221745222 is an abundant number, since it is smaller than the sum of its proper divisors (872044430010).

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

678221745222 is a wasteful number, since it uses less digits than its factorization.

678221745222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 469212.

The product of its digits is 1505280, while the sum is 48.

The spelling of 678221745222 in words is "six hundred seventy-eight billion, two hundred twenty-one million, seven hundred forty-five thousand, two hundred twenty-two".