6561015005115 has 32 divisors (see below), whose sum is σ = 11935283120640. Its totient is φ = 3417831069408.

The previous prime is 6561015005107. The next prime is 6561015005213. The reversal of 6561015005115 is 5115005101656.

It is a happy number.

It is not a de Polignac number, because 6561015005115 - 2³ = 6561015005107 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6561015005115.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 565111767 + ... + 565123376.

It is an arithmetic number, because the mean of its divisors is an integer number (372977597520).

Almost surely, 2^{6561015005115} is an apocalyptic number.

6561015005115 is a deficient number, since it is larger than the sum of its proper divisors (5374268115525).

6561015005115 is a wasteful number, since it uses less digits than its factorization.

6561015005115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1130235200 (or 1130235194 counting only the distinct ones).

The product of its (nonzero) digits is 22500, while the sum is 36.

The spelling of 6561015005115 in words is "six trillion, five hundred sixty-one billion, fifteen million, five thousand, one hundred fifteen".