6491520000 has 990 divisors, whose sum is σ = 28431405288. Its totient is φ = 1419264000.

The previous prime is 6491519999. The next prime is 6491520041. The reversal of 6491520000 is 251946.

6491520000 is a `hidden beast` number, since 649 + 15 + 2 + 0 + 0 + 0 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

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 89 ways as a sum of consecutive naturals, for example, 282239989 + ... + 282240011.

Almost surely, 2^6491520000 is an apocalyptic number.

6491520000 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 6491520000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14215702644).

6491520000 is an abundant number, since it is smaller than the sum of its proper divisors (21939885288).

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

6491520000 is a wasteful number, since it uses less digits than its factorization.

6491520000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83 (or 40 counting only the distinct ones).

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

The square root of 6491520000 is about 80569.9695916537. The cubic root of 6491520000 is about 1865.4436433054.

Adding to 6491520000 its reverse (251946), we get a palindrome (6491771946).

The spelling of 6491520000 in words is "six billion, four hundred ninety-one million, five hundred twenty thousand".