6402547800 has 960 divisors, whose sum is σ = 26791142400. Its totient is φ = 1399680000.

The previous prime is 6402547799. The next prime is 6402547813. The reversal of 6402547800 is 87452046.

6402547800 is a `hidden beast` number, since 640 + 2 + 5 + 4 + 7 + 8 + 0 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 239 ways as a sum of consecutive naturals, for example, 104959770 + ... + 104959830.

It is an arithmetic number, because the mean of its divisors is an integer number (27907440).

Almost surely, 2^6402547800 is an apocalyptic number.

6402547800 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 6402547800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13395571200).

6402547800 is an abundant number, since it is smaller than the sum of its proper divisors (20388594600).

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

6402547800 is a wasteful number, since it uses less digits than its factorization.

6402547800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150 (or 132 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 36.

The square root of 6402547800 is about 80015.9221655290. The cubic root of 6402547800 is about 1856.8818724266.

Adding to 6402547800 its reverse (87452046), we get a palindrome (6489999846).

The spelling of 6402547800 in words is "six billion, four hundred two million, five hundred forty-seven thousand, eight hundred".