8500670879281 has 9 divisors (see below), whose sum is σ = 9888559253931. Its totient is φ = 7286271831552.

The previous prime is 8500670879257. The next prime is 8500670879333. The reversal of 8500670879281 is 1829780760058.

The square root of 8500670879281 is 2915591.

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

It can be written as a sum of positive squares in only one way, i.e., 3963702719025 + 4536968160256 = 1990905^2 + 2130016^2 .

It is not a de Polignac number, because 8500670879281 - 2⁵ = 8500670879249 is a prime.

It is a super-2 number, since 2×8500670879281² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8500670879231) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 20200881 + ... + 20617393.

Almost surely, 2^{8500670879281} is an apocalyptic number.

8500670879281 is the 2915591-st square number.

8500670879281 is the 1457796-th centered octagonal number.

It is an amenable number.

8500670879281 is a deficient number, since it is larger than the sum of its proper divisors (1387888374650).

8500670879281 is an frugal number, since it uses more digits than its factorization.

8500670879281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 833040 (or 416520 counting only the distinct ones).

The product of its (nonzero) digits is 13547520, while the sum is 61.

The spelling of 8500670879281 in words is "eight trillion, five hundred billion, six hundred seventy million, eight hundred seventy-nine thousand, two hundred eighty-one".