6501505009986 has 192 divisors, whose sum is σ = 16665352704000. Its totient is φ = 1830858422400.

The previous prime is 6501505009957. The next prime is 6501505010023. The reversal of 6501505009986 is 6899005051056.

6501505009986 is a `hidden beast` number, since 6 + 5 + 0 + 1 + 50 + 500 + 9 + 9 + 86 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 128511216 + ... + 128561796.

It is an arithmetic number, because the mean of its divisors is an integer number (86798712000).

Almost surely, 2^{6501505009986} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6501505009986, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8332676352000).

6501505009986 is an abundant number, since it is smaller than the sum of its proper divisors (10163847694014).

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

6501505009986 is a wasteful number, since it uses less digits than its factorization.

6501505009986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50910 (or 50893 counting only the distinct ones).

The product of its (nonzero) digits is 2916000, while the sum is 54.

The spelling of 6501505009986 in words is "six trillion, five hundred one billion, five hundred five million, nine thousand, nine hundred eighty-six".