6560421400 has 96 divisors (see below), whose sum is σ = 16611436800. Its totient is φ = 2395008000.

The previous prime is 6560421391. The next prime is 6560421409. The reversal of 6560421400 is 41240656.

It is an interprime number because it is at equal distance from previous prime (6560421391) and next prime (6560421409).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6560421409) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 217225 + ... + 245575.

It is an arithmetic number, because the mean of its divisors is an integer number (173035800).

Almost surely, 2^6560421400 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 6560421400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8305718400).

6560421400 is an abundant number, since it is smaller than the sum of its proper divisors (10051015400).

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

6560421400 is a wasteful number, since it uses less digits than its factorization.

6560421400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28469 (or 28460 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 6560421400 is about 80996.4283163153. The cubic root of 6560421400 is about 1872.0204077389.

The spelling of 6560421400 in words is "six billion, five hundred sixty million, four hundred twenty-one thousand, four hundred".