16515065313 has 12 divisors (see below), whose sum is σ = 23864486100. Its totient is φ = 11005708896.

The previous prime is 16515065309. The next prime is 16515065321. The reversal of 16515065313 is 31356051561.

It can be written as a sum of positive squares in 2 ways, for example, as 13351340304 + 3163725009 = 115548^2 + 56247^2 .

It is not a de Polignac number, because 16515065313 - 2² = 16515065309 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16515065113) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 337006 + ... + 382887.

It is an arithmetic number, because the mean of its divisors is an integer number (1988707175).

Almost surely, 2^16515065313 is an apocalyptic number.

It is an amenable number.

16515065313 is a deficient number, since it is larger than the sum of its proper divisors (7349420787).

16515065313 is a wasteful number, since it uses less digits than its factorization.

16515065313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 722448 (or 722445 counting only the distinct ones).

The product of its (nonzero) digits is 40500, while the sum is 36.

The spelling of 16515065313 in words is "sixteen billion, five hundred fifteen million, sixty-five thousand, three hundred thirteen".