6489389736 has 128 divisors (see below), whose sum is σ = 19120406400. Its totient is φ = 2032266240.

The previous prime is 6489389693. The next prime is 6489389749. The reversal of 6489389736 is 6379839846.

6489389736 is a `hidden beast` number, since 6 + 489 + 3 + 89 + 73 + 6 = 666.

It is a super-2 number, since 2×6489389736² = 84224358291404299392, which contains 22 as substring.

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, 2690371 + ... + 2692781.

It is an arithmetic number, because the mean of its divisors is an integer number (149378175).

Almost surely, 2^6489389736 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 6489389736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9560203200).

6489389736 is an abundant number, since it is smaller than the sum of its proper divisors (12631016664).

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

6489389736 is a wasteful number, since it uses less digits than its factorization.

6489389736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3176 (or 3166 counting only the distinct ones).

The product of its digits is 47029248, while the sum is 63.

The square root of 6489389736 is about 80556.7485441164. The cubic root of 6489389736 is about 1865.2395656673.

The spelling of 6489389736 in words is "six billion, four hundred eighty-nine million, three hundred eighty-nine thousand, seven hundred thirty-six".