6506501503440 has 320 divisors, whose sum is σ = 20434809802752. Its totient is φ = 1712499148800.

The previous prime is 6506501503433. The next prime is 6506501503471. The reversal of 6506501503440 is 443051056056.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3724384647 + ... + 3724386393.

Almost surely, 2^{6506501503440} is an apocalyptic number.

6506501503440 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6506501503440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10217404901376).

6506501503440 is an abundant number, since it is smaller than the sum of its proper divisors (13928308299312).

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

6506501503440 is a wasteful number, since it uses less digits than its factorization.

6506501503440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2538 (or 2532 counting only the distinct ones).

The product of its (nonzero) digits is 216000, while the sum is 39.

Adding to 6506501503440 its reverse (443051056056), we get a palindrome (6949552559496).

The spelling of 6506501503440 in words is "six trillion, five hundred six billion, five hundred one million, five hundred three thousand, four hundred forty".