6513868800 has 720 divisors, whose sum is σ = 26003891200. Its totient is φ = 1592524800.

The previous prime is 6513868783. The next prime is 6513868813. The reversal of 6513868800 is 88683156.

It is a tau number, because it is divible by the number of its divisors (720).

It is a super-2 number, since 2×6513868800² = 84860973487226880000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 210124785 + ... + 210124815.

Almost surely, 2^6513868800 is an apocalyptic number.

6513868800 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 6513868800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13001945600).

6513868800 is an abundant number, since it is smaller than the sum of its proper divisors (19490022400).

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

6513868800 is a wasteful number, since it uses less digits than its factorization.

6513868800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97 (or 60 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 45.

The square root of 6513868800 is about 80708.5422988174. The cubic root of 6513868800 is about 1867.5819547589.

The spelling of 6513868800 in words is "six billion, five hundred thirteen million, eight hundred sixty-eight thousand, eight hundred".