16515116660513 has 8 divisors (see below), whose sum is σ = 17084651917800. Its totient is φ = 15945584635008.

The previous prime is 16515116660459. The next prime is 16515116660521. The reversal of 16515116660513 is 31506661151561.

16515116660513 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 1003428934369 + 15511687726144 = 1001713^2 + 3938488^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16515116660513 - 2²⁴ = 16515099883297 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (16515166660513) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14513573 + ... + 15610061.

It is an arithmetic number, because the mean of its divisors is an integer number (2135581489725).

Almost surely, 2^{16515116660513} is an apocalyptic number.

It is an amenable number.

16515116660513 is a deficient number, since it is larger than the sum of its proper divisors (569535257287).

16515116660513 is a wasteful number, since it uses less digits than its factorization.

16515116660513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1615891.

The product of its (nonzero) digits is 486000, while the sum is 47.

The spelling of 16515116660513 in words is "sixteen trillion, five hundred fifteen billion, one hundred sixteen million, six hundred sixty thousand, five hundred thirteen".