28466653222225 has 9 divisors (see below), whose sum is σ = 35298683075163. Its totient is φ = 22773301236120.

The previous prime is 28466653222187. The next prime is 28466653222247. The reversal of 28466653222225 is 52222235666482.

The square root of 28466653222225 is 5335415.

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., 10247995160001 + 18218658062224 = 3201249^2 + 4268332^2 .

It is not a de Polignac number, because 28466653222225 - 2¹⁹ = 28466652697937 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 26143534 + ... + 27210616.

Almost surely, 2^{28466653222225} is an apocalyptic number.

28466653222225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28466653222225 is the 5335415-th square number.

28466653222225 is the 2667708-th centered octagonal number.

It is an amenable number.

28466653222225 is a deficient number, since it is larger than the sum of its proper divisors (6832029852938).

28466653222225 is an frugal number, since it uses more digits than its factorization.

28466653222225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2134176 (or 1067088 counting only the distinct ones).

The product of its digits is 33177600, while the sum is 55.

The spelling of 28466653222225 in words is "twenty-eight trillion, four hundred sixty-six billion, six hundred fifty-three million, two hundred twenty-two thousand, two hundred twenty-five".