6498139648 has 320 divisors, whose sum is σ = 18038845440. Its totient is φ = 2256076800.

The previous prime is 6498139633. The next prime is 6498139663. The reversal of 6498139648 is 8469318946.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (6498139633) and next prime (6498139663).

It is a junction number, because it is equal to n+sod(n) for n = 6498139592 and 6498139601.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15887668 + ... + 15888076.

It is an arithmetic number, because the mean of its divisors is an integer number (56371392).

Almost surely, 2^6498139648 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 6498139648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9019422720).

6498139648 is an abundant number, since it is smaller than the sum of its proper divisors (11540705792).

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

6498139648 is a wasteful number, since it uses less digits than its factorization.

6498139648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 489 (or 473 counting only the distinct ones).

The product of its digits is 8957952, while the sum is 58.

The square root of 6498139648 is about 80611.0392440142. The cubic root of 6498139648 is about 1866.0775156610.

The spelling of 6498139648 in words is "six billion, four hundred ninety-eight million, one hundred thirty-nine thousand, six hundred forty-eight".