6520323040 has 192 divisors, whose sum is σ = 19333375488. Its totient is φ = 2018764800.

The previous prime is 6520323037. The next prime is 6520323049. The reversal of 6520323040 is 403230256.

It is a happy number.

It is a super-2 number, since 2×6520323040² = 85029225091909683200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6520322996 and 6520323014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6520323049) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1932555 + ... + 1935925.

It is an arithmetic number, because the mean of its divisors is an integer number (100694664).

Almost surely, 2^6520323040 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 6520323040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9666687744).

6520323040 is an abundant number, since it is smaller than the sum of its proper divisors (12813052448).

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

6520323040 is a wasteful number, since it uses less digits than its factorization.

6520323040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3561 (or 3553 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 25.

The square root of 6520323040 is about 80748.5172619287. The cubic root of 6520323040 is about 1868.1985797660.

Adding to 6520323040 its reverse (403230256), we get a palindrome (6923553296).

The spelling of 6520323040 in words is "six billion, five hundred twenty million, three hundred twenty-three thousand, forty".