8500243561 has 8 divisors (see below), whose sum is σ = 8884163520. Its totient is φ = 8117518992.

The previous prime is 8500243553. The next prime is 8500243573. The reversal of 8500243561 is 1653420058.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 8500243561 - 2³ = 8500243553 is a prime.

It is a super-3 number, since 3×8500243561³ (a number of 31 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8500246561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 284290 + ... + 312763.

It is an arithmetic number, because the mean of its divisors is an integer number (1110520440).

Almost surely, 2^8500243561 is an apocalyptic number.

It is an amenable number.

8500243561 is a deficient number, since it is larger than the sum of its proper divisors (383919959).

8500243561 is a wasteful number, since it uses less digits than its factorization.

8500243561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 597695.

The product of its (nonzero) digits is 28800, while the sum is 34.

The square root of 8500243561 is about 92196.7654584476. The cubic root of 8500243561 is about 2040.8470435568.

The spelling of 8500243561 in words is "eight billion, five hundred million, two hundred forty-three thousand, five hundred sixty-one".