6545254521 has 32 divisors (see below), whose sum is σ = 9507456000. Its totient is φ = 3981248064.

The previous prime is 6545254481. The next prime is 6545254531. The reversal of 6545254521 is 1254525456.

It is not a de Polignac number, because 6545254521 - 2¹¹ = 6545252473 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an alternating number because its digits alternate between even and odd.

It is a self number, because there is not a number n which added to its sum of digits gives 6545254521.

It is not an unprimeable number, because it can be changed into a prime (6545254531) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 2180980 + ... + 2183978.

It is an arithmetic number, because the mean of its divisors is an integer number (297108000).

Almost surely, 2^6545254521 is an apocalyptic number.

It is an amenable number.

6545254521 is a deficient number, since it is larger than the sum of its proper divisors (2962201479).

6545254521 is a wasteful number, since it uses less digits than its factorization.

6545254521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3645.

The product of its digits is 240000, while the sum is 39.

The square root of 6545254521 is about 80902.7473019304. The cubic root of 6545254521 is about 1870.5766684037.

Adding to 6545254521 its reverse (1254525456), we get a palindrome (7799779977).

The spelling of 6545254521 in words is "six billion, five hundred forty-five million, two hundred fifty-four thousand, five hundred twenty-one".