6505615530 has 192 divisors, whose sum is σ = 18044208000. Its totient is φ = 1623584256.

The previous prime is 6505615499. The next prime is 6505615531. The reversal of 6505615530 is 355165056.

6505615530 is a `hidden beast` number, since 6 + 5 + 0 + 5 + 615 + 5 + 30 = 666.

It is not an unprimeable number, because it can be changed into a prime (6505615531) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 12780916 + ... + 12781424.

It is an arithmetic number, because the mean of its divisors is an integer number (93980250).

Almost surely, 2^6505615530 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6505615530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9022104000).

6505615530 is an abundant number, since it is smaller than the sum of its proper divisors (11538592470).

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

6505615530 is a wasteful number, since it uses less digits than its factorization.

6505615530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 693 (or 690 counting only the distinct ones).

The product of its (nonzero) digits is 67500, while the sum is 36.

The square root of 6505615530 is about 80657.3960030945. The cubic root of 6505615530 is about 1866.7928603391.

The spelling of 6505615530 in words is "six billion, five hundred five million, six hundred fifteen thousand, five hundred thirty".