222867578978 has 18 divisors (see below), whose sum is σ = 367467332043. Its totient is φ = 101300106820.

The previous prime is 222867578957. The next prime is 222867579019. The reversal of 222867578978 is 879875768222.

222867578978 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 111433789489 + 111433789489 = 333817^2 + 333817^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=333817.

It is a Duffinian number.

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 8 ways as a sum of consecutive naturals, for example, 7328801 + ... + 7359147.

Almost surely, 2^222867578978 is an apocalyptic number.

222867578978 is a deficient number, since it is larger than the sum of its proper divisors (144599753065).

222867578978 is an frugal number, since it uses more digits than its factorization.

222867578978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60718 (or 30360 counting only the distinct ones).

The product of its digits is 379330560, while the sum is 71.

The spelling of 222867578978 in words is "two hundred twenty-two billion, eight hundred sixty-seven million, five hundred seventy-eight thousand, nine hundred seventy-eight".