6505694720 has 320 divisors, whose sum is σ = 18855936000. Its totient is φ = 2149539840.

The previous prime is 6505694711. The next prime is 6505694749. The reversal of 6505694720 is 274965056.

It is a tau number, because it is divible by the number of its divisors (320).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 27220361 + ... + 27220599.

It is an arithmetic number, because the mean of its divisors is an integer number (58924800).

Almost surely, 2^6505694720 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 6505694720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9427968000).

6505694720 is an abundant number, since it is smaller than the sum of its proper divisors (12350241280).

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

6505694720 is an equidigital number, since it uses as much as digits as its factorization.

6505694720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314 (or 284 counting only the distinct ones).

The product of its (nonzero) digits is 453600, while the sum is 44.

The square root of 6505694720 is about 80657.8869051254. The cubic root of 6505694720 is about 1866.8004348582.

The spelling of 6505694720 in words is "six billion, five hundred five million, six hundred ninety-four thousand, seven hundred twenty".