6550215140 has 72 divisors (see below), whose sum is σ = 16013676672. Its totient is φ = 2244043200.

The previous prime is 6550215137. The next prime is 6550215157. The reversal of 6550215140 is 415120556.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2302559 + ... + 2305401.

It is an arithmetic number, because the mean of its divisors is an integer number (222412176).

Almost surely, 2^6550215140 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 6550215140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8006838336).

6550215140 is an abundant number, since it is smaller than the sum of its proper divisors (9463461532).

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

6550215140 is a wasteful number, since it uses less digits than its factorization.

6550215140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5217 (or 5208 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 29.

The square root of 6550215140 is about 80933.3994096380. The cubic root of 6550215140 is about 1871.0491162865.

Adding to 6550215140 its reverse (415120556), we get a palindrome (6965335696).

The spelling of 6550215140 in words is "six billion, five hundred fifty million, two hundred fifteen thousand, one hundred forty".