6445520552 has 16 divisors (see below), whose sum is σ = 12610801440. Its totient is φ = 3082640176.

The previous prime is 6445520551. The next prime is 6445520569. The reversal of 6445520552 is 2550255446.

It is a happy number.

It is a super-3 number, since 3×6445520552³ (a number of 30 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (6445520551) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17514818 + ... + 17515185.

It is an arithmetic number, because the mean of its divisors is an integer number (788175090).

Almost surely, 2^6445520552 is an apocalyptic number.

It is an amenable number.

6445520552 is a deficient number, since it is larger than the sum of its proper divisors (6165280888).

6445520552 is a wasteful number, since it uses less digits than its factorization.

6445520552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35030032 (or 35030028 counting only the distinct ones).

The product of its (nonzero) digits is 240000, while the sum is 38.

The square root of 6445520552 is about 80283.9993522993. Note that the first 3 decimals coincide. The cubic root of 6445520552 is about 1861.0269651529.

Adding to 6445520552 its reverse (2550255446), we get a palindrome (8995775998).

The spelling of 6445520552 in words is "six billion, four hundred forty-five million, five hundred twenty thousand, five hundred fifty-two".