28134516517 has 2 divisors, whose sum is σ = 28134516518. Its totient is φ = 28134516516.

The previous prime is 28134516511. The next prime is 28134516533. The reversal of 28134516517 is 71561543182.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27223020036 + 911496481 = 164994^2 + 30191^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28134516517 is a prime.

It is a super-2 number, since 2×28134516517² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28134516511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14067258258 + 14067258259.

It is an arithmetic number, because the mean of its divisors is an integer number (14067258259).

Almost surely, 2^28134516517 is an apocalyptic number.

It is an amenable number.

28134516517 is a deficient number, since it is larger than the sum of its proper divisors (1).

28134516517 is an equidigital number, since it uses as much as digits as its factorization.

28134516517 is an evil number, because the sum of its binary digits is even.

The product of its digits is 201600, while the sum is 43.

The spelling of 28134516517 in words is "twenty-eight billion, one hundred thirty-four million, five hundred sixteen thousand, five hundred seventeen".