9778848223225 has 27 divisors (see below), whose sum is σ = 12797948502477. Its totient is φ = 7411112448480.

The previous prime is 9778848223217. The next prime is 9778848223271. The reversal of 9778848223225 is 5223228488779.

The square root of 9778848223225 is 3127115.

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

It can be written as a sum of positive squares in 4 ways, for example, as 99681012729 + 9679167210496 = 315723^2 + 3111136^2 .

It is not a de Polignac number, because 9778848223225 - 2³ = 9778848223217 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 297059467 + ... + 297092383.

Almost surely, 2^{9778848223225} is an apocalyptic number.

9778848223225 is a gapful number since it is divisible by the number (95) formed by its first and last digit.

9778848223225 is the 3127115-th square number.

9778848223225 is the 1563558-th centered octagonal number.

It is an amenable number.

9778848223225 is a deficient number, since it is larger than the sum of its proper divisors (3019100279252).

9778848223225 is an frugal number, since it uses more digits than its factorization.

9778848223225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65882 (or 32941 counting only the distinct ones).

The product of its digits is 216760320, while the sum is 67.

The spelling of 9778848223225 in words is "nine trillion, seven hundred seventy-eight billion, eight hundred forty-eight million, two hundred twenty-three thousand, two hundred twenty-five".