6545619025 has 27 divisors (see below), whose sum is σ = 8927585499. Its totient is φ = 4757214000.

The previous prime is 6545619019. The next prime is 6545619053. The reversal of 6545619025 is 5209165456.

The square root of 6545619025 is 80905.

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., 2356422849 + 4189196176 = 48543^2 + 64724^2 .

It is not a de Polignac number, because 6545619025 - 2⁷ = 6545618897 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 (13) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 4449040 + ... + 4450510.

Almost surely, 2^6545619025 is an apocalyptic number.

6545619025 is the 80905-th square number.

6545619025 is the 40453-rd centered octagonal number.

It is an amenable number.

6545619025 is a deficient number, since it is larger than the sum of its proper divisors (2381966474).

6545619025 is an equidigital number, since it uses as much as digits as its factorization.

6545619025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2974 (or 1487 counting only the distinct ones).

The product of its (nonzero) digits is 324000, while the sum is 43.

The cubic root of 6545619025 is about 1870.6113917807.

The spelling of 6545619025 in words is "six billion, five hundred forty-five million, six hundred nineteen thousand, twenty-five".