6520161600 has 252 divisors, whose sum is σ = 24394911840. Its totient is φ = 1647129600.

The previous prime is 6520161563. The next prime is 6520161631. The reversal of 6520161600 is 61610256.

It is a happy number.

6520161600 is a `hidden beast` number, since 6 + 52 + 0 + 1 + 6 + 1 + 600 = 666.

It is a super-2 number, since 2×6520161600² = 85025014580229120000, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 261685 + ... + 285515.

Almost surely, 2^6520161600 is an apocalyptic number.

6520161600 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6520161600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12197455920).

6520161600 is an abundant number, since it is smaller than the sum of its proper divisors (17874750240).

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

6520161600 is a wasteful number, since it uses less digits than its factorization.

6520161600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23878 (or 23860 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 6520161600 is about 80747.5176089024. The cubic root of 6520161600 is about 1868.1831610786.

Adding to 6520161600 its reverse (61610256), we get a palindrome (6581771856).

The spelling of 6520161600 in words is "six billion, five hundred twenty million, one hundred sixty-one thousand, six hundred".