6500500820 has 48 divisors (see below), whose sum is σ = 15144494400. Its totient is φ = 2323749120.

The previous prime is 6500500801. The next prime is 6500500901. The reversal of 6500500820 is 280050056.

It is a self number, because there is not a number n which added to its sum of digits gives 6500500820.

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, 237425 + ... + 263384.

It is an arithmetic number, because the mean of its divisors is an integer number (315510300).

Almost surely, 2^6500500820 is an apocalyptic number.

It is an amenable number.

6500500820 is an abundant number, since it is smaller than the sum of its proper divisors (8643993580).

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

6500500820 is a wasteful number, since it uses less digits than its factorization.

6500500820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 500888 (or 500886 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 6500500820 is about 80625.6833769488. The cubic root of 6500500820 is about 1866.3035083632.

Adding to 6500500820 its reverse (280050056), we get a palindrome (6780550876).

The spelling of 6500500820 in words is "six billion, five hundred million, five hundred thousand, eight hundred twenty".