5645874971025 has 27 divisors (see below), whose sum is σ = 10112453230971. Its totient is φ = 3011114309040.

The previous prime is 5645874970979. The next prime is 5645874971027. The reversal of 5645874971025 is 5201794785465.

It is a happy number.

The square root of 5645874971025 is 2376105.

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

5645874971025 is a `hidden beast` number, since 5 + 6 + 4 + 587 + 49 + 7 + 1 + 0 + 2 + 5 = 666.

It can be written as a sum of positive squares in only one way, i.e., 2032514989569 + 3613359981456 = 1425663^2 + 1900884^2 .

It is not a de Polignac number, because 5645874971025 - 2³³ = 5637285036433 is a prime.

It is not an unprimeable number, because it can be changed into a prime (5645874971027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 35562372 + ... + 35720778.

Almost surely, 2^{5645874971025} is an apocalyptic number.

5645874971025 is the 2376105-th square number.

5645874971025 is the 1188053-rd centered octagonal number.

It is an amenable number.

5645874971025 is a deficient number, since it is larger than the sum of its proper divisors (4466578259946).

5645874971025 is an frugal number, since it uses more digits than its factorization.

5645874971025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316830 (or 158415 counting only the distinct ones).

The product of its (nonzero) digits is 84672000, while the sum is 63.

The spelling of 5645874971025 in words is "five trillion, six hundred forty-five billion, eight hundred seventy-four million, nine hundred seventy-one thousand, twenty-five".