4865178661225 has 27 divisors (see below), whose sum is σ = 6137626691397. Its totient is φ = 3825662678880.

The previous prime is 4865178661201. The next prime is 4865178661261. The reversal of 4865178661225 is 5221668715684.

The square root of 4865178661225 is 2205715.

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 863834548329 + 4001344112896 = 929427^2 + 2000336^2 .

It is not a de Polignac number, because 4865178661225 - 2⁵ = 4865178661193 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, 650682187 + ... + 650689663.

Almost surely, 2^{4865178661225} is an apocalyptic number.

4865178661225 is the 2205715-th square number.

4865178661225 is the 1102858-th centered octagonal number.

It is an amenable number.

4865178661225 is a deficient number, since it is larger than the sum of its proper divisors (1272448030172).

4865178661225 is an frugal number, since it uses more digits than its factorization.

4865178661225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15082 (or 7541 counting only the distinct ones).

The product of its digits is 38707200, while the sum is 61.

The spelling of 4865178661225 in words is "four trillion, eight hundred sixty-five billion, one hundred seventy-eight million, six hundred sixty-one thousand, two hundred twenty-five".