8506129741729 has 3 divisors (see below), whose sum is σ = 8506132658257. Its totient is φ = 8506126825202.

The previous prime is 8506129741709. The next prime is 8506129741787. The reversal of 8506129741729 is 9271479216058.

The square root of 8506129741729 is 2916527.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 8506129741729 - 2¹⁵ = 8506129708961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8506129741709) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1458264 + ... + 4374790.

Almost surely, 2^{8506129741729} is an apocalyptic number.

8506129741729 is the 2916527-th square number.

8506129741729 is the 1458264-th centered octagonal number.

It is an amenable number.

8506129741729 is a deficient number, since it is larger than the sum of its proper divisors (2916528).

8506129741729 is an frugal number, since it uses more digits than its factorization.

8506129741729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5833054 (or 2916527 counting only the distinct ones).

The product of its (nonzero) digits is 15240960, while the sum is 61.

The spelling of 8506129741729 in words is "eight trillion, five hundred six billion, one hundred twenty-nine million, seven hundred forty-one thousand, seven hundred twenty-nine".