12978222084 has 45 divisors (see below), whose sum is σ = 33932997637. Its totient is φ = 4325390496.

The previous prime is 12978222077. The next prime is 12978222097. The reversal of 12978222084 is 48022287921.

It is a happy number.

The square root of 12978222084 is 113922.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 9904628484 + 3073593600 = 99522^2 + 55440^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 2047432 + ... + 2053760.

Almost surely, 2^12978222084 is an apocalyptic number.

12978222084 is the 113922-nd square number.

It is an amenable number.

12978222084 is an abundant number, since it is smaller than the sum of its proper divisors (20954775553).

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

12978222084 is an frugal number, since it uses more digits than its factorization.

12978222084 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12674 (or 6334 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 45.

The spelling of 12978222084 in words is "twelve billion, nine hundred seventy-eight million, two hundred twenty-two thousand, eighty-four".