1647872853025 has 27 divisors (see below), whose sum is σ = 2377037325369. Its totient is φ = 1129939147680.

The previous prime is 1647872852999. The next prime is 1647872853061. The reversal of 1647872853025 is 5203582787461.

The square root of 1647872853025 is 1283695.

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 374839042081 + 1273033810944 = 612241^2 + 1128288^2 .

It is not a de Polignac number, because 1647872853025 - 2²⁷ = 1647738635297 is a prime.

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 26 ways as a sum of consecutive naturals, for example, 44910987 + ... + 44947663.

Almost surely, 2^{1647872853025} is an apocalyptic number.

1647872853025 is the 1283695-th square number.

1647872853025 is the 641848-th centered octagonal number.

It is an amenable number.

1647872853025 is a deficient number, since it is larger than the sum of its proper divisors (729164472344).

1647872853025 is an frugal number, since it uses more digits than its factorization.

1647872853025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73378 (or 36689 counting only the distinct ones).

The product of its (nonzero) digits is 22579200, while the sum is 58.

The spelling of 1647872853025 in words is "one trillion, six hundred forty-seven billion, eight hundred seventy-two million, eight hundred fifty-three thousand, twenty-five".