6521523652 has 48 divisors (see below), whose sum is σ = 13412613760. Its totient is φ = 2715939072.

The previous prime is 6521523623. The next prime is 6521523703. The reversal of 6521523652 is 2563251256.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 911224 + ... + 918352.

Almost surely, 2^6521523652 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6521523652, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6706306880).

6521523652 is an abundant number, since it is smaller than the sum of its proper divisors (6891090108).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6521523652 is a wasteful number, since it uses less digits than its factorization.

6521523652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8060 (or 8058 counting only the distinct ones).

The product of its digits is 108000, while the sum is 37.

The square root of 6521523652 is about 80755.9511862748. The cubic root of 6521523652 is about 1868.3132389102.

The spelling of 6521523652 in words is "six billion, five hundred twenty-one million, five hundred twenty-three thousand, six hundred fifty-two".