8727145517 has 4 divisors (see below), whose sum is σ = 9240507036. Its totient is φ = 8213784000.

The previous prime is 8727145477. The next prime is 8727145523. The reversal of 8727145517 is 7155417278.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7155417278 = 2 ⋅3577708639.

It can be written as a sum of positive squares in 2 ways, for example, as 2978321476 + 5748824041 = 54574^2 + 75821^2 .

It is a cyclic number.

It is not a de Polignac number, because 8727145517 - 2²⁴ = 8710368301 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8727145577) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 256680734 + ... + 256680767.

It is an arithmetic number, because the mean of its divisors is an integer number (2310126759).

Almost surely, 2^8727145517 is an apocalyptic number.

It is an amenable number.

8727145517 is a deficient number, since it is larger than the sum of its proper divisors (513361519).

8727145517 is a wasteful number, since it uses less digits than its factorization.

8727145517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 513361518.

The product of its digits is 548800, while the sum is 47.

The square root of 8727145517 is about 93419.1924445935. The cubic root of 8727145517 is about 2058.8469933304.

The spelling of 8727145517 in words is "eight billion, seven hundred twenty-seven million, one hundred forty-five thousand, five hundred seventeen".