6516389360 has 80 divisors (see below), whose sum is σ = 16384368000. Its totient is φ = 2395975680.

The previous prime is 6516389351. The next prime is 6516389471. The reversal of 6516389360 is 639836156.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×6516389360² = 84926660582242419200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 237641 + ... + 263639.

It is an arithmetic number, because the mean of its divisors is an integer number (204804600).

Almost surely, 2^6516389360 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 6516389360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8192184000).

6516389360 is an abundant number, since it is smaller than the sum of its proper divisors (9867978640).

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

6516389360 is a wasteful number, since it uses less digits than its factorization.

6516389360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26266 (or 26260 counting only the distinct ones).

The product of its (nonzero) digits is 699840, while the sum is 47.

The square root of 6516389360 is about 80724.1559881551. The cubic root of 6516389360 is about 1867.8228124055.

The spelling of 6516389360 in words is "six billion, five hundred sixteen million, three hundred eighty-nine thousand, three hundred sixty".