6501115500 has 96 divisors (see below), whose sum is σ = 20652323328. Its totient is φ = 1576024000.

The previous prime is 6501115483. The next prime is 6501115507. The reversal of 6501115500 is 55111056.

It is not an unprimeable number, because it can be changed into a prime (6501115507) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 180504 + ... + 213503.

It is an arithmetic number, because the mean of its divisors is an integer number (215128368).

Almost surely, 2^6501115500 is an apocalyptic number.

6501115500 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6501115500 is an abundant number, since it is smaller than the sum of its proper divisors (14151207828).

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

6501115500 is a wasteful number, since it uses less digits than its factorization.

6501115500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 394040 (or 394028 counting only the distinct ones).

The product of its (nonzero) digits is 750, while the sum is 24.

The square root of 6501115500 is about 80629.4952235223. The cubic root of 6501115500 is about 1866.3623316916.

Adding to 6501115500 its reverse (55111056), we get a palindrome (6556226556).

The spelling of 6501115500 in words is "six billion, five hundred one million, one hundred fifteen thousand, five hundred".